David Buss: Sex, Dating, Relationships, and Sex Differences | Lex Fridman Podcast #282
sndW9hzX-wA • 2022-05-04
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Kind: captions Language: en what do women want tell me what all the things women want in a long-term mate and so i would start at one end of the blackboard there were like five blackboards and they said well i want a mate who's who's kind who's understanding who's intelligent who's healthy who's got a good sense of humor who shares my values and and i just go and fill five blackboards and then run out of space so then i turn to the men and i say well what do men want and then i i run out of space after about a blackboard and a half because they they can't think of anything else so the women i think there's a lot of explanations for that the following is a conversation with david buss evolutionary psychologist at ut austin researching human sex differences in mate selection he's considered one of the founders of evolutionary psychology and has authored many exciting and challenging books including the evolution of desire strategies of human mating bad men the hidden roots of sexual deception harassment and assault and the murderer next door why the mind is designed to kill we talk a lot about sex dating relationships and love i take these at times controversial topics very seriously but i also try to inject humor and ridiculousness throughout this conversation and all conversations i do please do not mistake my silliness for lack of seriousness and my seriousness for a lack of silliness and above all do not mistake my suit and tie or my phd as a sign of intelligence or wisdom i barely know what i'm talking about on most days i'm simply curious and hoping to understand the way a child does what the heck is going on in this weird and wonderful civilization of ours if i say something stupid as i often do i promise to learn and to improve as mark twain said i do not want my schooling to interfere with my education open-minded curiosity i think is the best guide for a proper and fun lifelong education this is the lex friedman podcast to support it please check out our sponsors in the description and now dear friends here's david bus what is more important in the history of the development of human civilization sex or violence so mating strategies or military strategies oh well both are important i mean uh first of all humans are sexually reproducing species and so everything has to go through sex you know so in our our mating psychology has to be very rich and complex because uh to succeed for us to be here now all of our ancestors in an unbroken chain have had to succeed in selecting a fertile mate attracting that mate be mutually chosen by that mate stay together long enough do all the sexual things you need to do to reproduce have the kids survive etc so everything has to go through mating and in that sense i think it's uh i mean survival is really only a means to an end if you if you will uh so uh so sex has got to be important and humans have a very rich evol sexual psychology or an evolved mating psychology okay but uh i wouldn't minimize the importance of violence either there's a ton of evidence that humans evolved in the context of small groups and with a fair amount of small group warfare so intertribal warfare uh where uh and this is a harsh realization but there historically um this is part of our bad evolutionary history it has been advantageous from a purely reproductive standpoint to conquer a neighboring group kill the males and get whatever resources they have including females and and sexual resources to as well as tools weapons territory and so forth and so um and so i think that we have uh of course it's it's typically males um who do that i mean yes some females have participated in warfare but as far as i know there's never been a single case in all of human recorded history of women forming a war tribe with other women to attack another group of women and kill them and capture the men as husbands but the these uh this phenomenon is common um in the ethnographic record and small group uh studies um it's part of our common thing so just one concrete example unfortunately he's dead now he passed away napoleon chagnon who studied the yanamamo for many many years um when he first started interviewing them he he asked them you know why do you go to war um and they said well to to capture women of course what it's the only sensible reason and they said you know why do why does your culture go to war or however they phrased it and he said well you know we could work for to spread democracy and ideas and everything they basically fell off their logs laughing at such a stupid reason because why risk your life for anything um other than women of course it's more complex than that because some go to war for reputational reasons they say if we if we don't retaliate because we've been attacked and they've stolen three of our women if we don't retaliate then we will get a reputation as exploitable and then other groups will start to attack us as well and so they get into these cycles of um you know like the hatfields and mccoys of attacks counter-attacks retribution and part of it is is um reputation management um so that's that's between groups and and i think that's been the the primary source of violence but not the only source so there's also within group conflict and so many ethnographies many traditional societies have things some of them are ritualized like wrestling matches or in diana mama they have uh these uh we're used to these uh chest pounding duels where so if we're in this match you challenge me and i have to of course chest pounding duel like this yeah yeah so it's not you're not hitting each other you're just it's like peacocking you oh no you're hitting each other oh sorry yeah so they they get 20 paces away and they they run up and you punch the other guy in the chest and he has to basically stand there and then he does the same and everything oh wow uh and then it's basically last man standing that's well i suppose that's better than the face that's an interesting decision with the chest yeah i mean i'm sure if you get good at that kind of thing you could start breaking ribs yeah and you can get loose about the rules of where exactly in the chest you can hit whatever and there's that guy who's always known for hitting not exactly in the chat right where is it only missing right right the the mike tyson of eating your ear off so interesting so there's like ritualized uh conflict sort of uh you purify the um the competition that that that resolves some kind of issue well yeah it's important to establish status hierarchies you know um but um but also and here's here's just another one more concrete point on on that the yanaman we don't have this in our language we just have one word for kill or murder but mama have um you're either an una if you're a male you're an unokai or a non-unokai the non-unokai are men who have not killed if you're an unokai that means you have killed someone and the unokai among the anamomo historically had higher status and more wives said they're a uh poliginous uh society which is which has been true of um something like 83 to 85 percent of uh traditional societies were actually i was just corrected by a anthropologist she said we no longer call them traditional societies we call them small-scale societies so nothing can be called traditional i i don't know bacteria the traditional society yeah yeah i think it's just uh one of these things the language the word the the words that are deemed appropriate to use to describe things change over time so yeah so words can hurt people they can inspire people words are funny powerful things you authored the textbook titled evolutionary psychology the new science of mind in its uh sixth edition what is the magic ingredient that gave birth to homo sapiens do you think is it fire cooking ability to collaborate share ideas ability to contemplate our own mortality all that kind of stuff yeah well i think it's hard to isolate one factor i know uh i know you've had richard wrangham on this podcast it was a wonderful wonderful interview and uh he used to be a colleague of mine when i was a professor at michigan and um i've stayed in touch with him uh on off he's a brilliant brilliant guy and he thinks fire and cooking have been one of the key things but i think it's hard to isolate i would trace at least part of our uniqueness to uh the uniqueness of our mating system so we have in in mating uh unlike chimpanzees who are our closest primate relative and of which richard wrangham is is a world's expert but they have basically no long-term pure bonded mating okay they female comes into estrus all the mating all the sex happens most of the sex happens during that window but humans have evolved long-term pure bonded mating uh and it's it's only one mating strategy but it's a really important one and then you have with that male parental care so basically again we go back to chimps and chimps with whom we share more than 98 of our dna males don't do anything so they inseminate the females but then when the kids are born they basically don't do much of anything in terms of provisioning and so forth but human males do we invest in the modern environment could be decades you know especially with the boomerang kids and everything but we're not all males do but compared to the vast majority of mammals we are a very heavy male parental investment species could you uh if it's okay and i'll ask you a bunch of dumb basic questions because those are fun uh could you define mating here how we is mating refer to the the the series of sexual acts that lead to reproduction is it include like dating and love and camaraderie uh loyalty all those things yes uh i you know yes yeah when i first started studying yeah i don't respect it's when i first started studying it i looked for the right term and obviously it's much broader than sex so by mating i include things like mate selection mate preferences made attraction mate retention mate poaching um made expulsions i mean poaching that sounds fun so the early the uh the game theoretics strategy made selection is primary with mating what meeting is about or do you include the long term once uh you agree that you're gonna stick this out for a while and have multiple children is that also amazing yes i include that as well so it's it's a broad category broad definition and and absolutely includes the emotion of love um and of course there are many different types of brotherly love love parents for children uh but love i think uh and this is one of the shifts in the social sciences so when i was an undergraduate for example i was taught that love is this um invention by some caucasian european poets a couple hundred years ago and um and it turns out that's not the case so you you there's been extensive cross-cultural evidence now that um that people not every person in all cultures of course but all some people in all cultures experience this emotion that we call love and for the word love are we going to in this conversation try to stick to sort of romantic love for the the for the meaning of the word love well they're uh that's that's a great question but um i mean they're uh it's pretty well established that there are these different phases of love so there's this uh infatuation phase where uh our psychology we we get obsessional thoughts it's hard to focus on work when we're not with the person we're thinking about the other person constantly uh so there's kind of like ideolog ideational intrusion into our psychology but you you can't sustain that i mean it would be uh and then of course there's a uh pardon the phrase but what i describe is the fucking like bunnies phase of of this you know intense sexuality but people have other adaptive problems they have to solve and so you can't stay in that state for too long and so that subsides over time and um and develops into uh at least in many cases this warm attachment cuddling bunnies long-term cuddling bunnies yes the face of the relationship but still romantic not like brotherly love or you know because i i talk about a lot of love a lot and for me you know love is a broader experience of just um experiencing the joy and the beauty of life so like just looking out in nature yeah that's the kind of love like whatever the chemicals that lead to a feeling that at least echoes the same kind of feeling that you get with romantic love you can experience that with even inanimate objects that sounds weird to say but just a gratitude and appreciation um not in some kind of uh weird zen way but just in a very human way just it feels good to be alive kind of yeah yeah yeah i guess i i would i mean that's an interesting thought i hadn't thought about that i guess there i would use other terms to describe that so like the term ah for example when you see a beautiful sunset you know that's why i kind of started out by saying i think there are different types of love and i'm focusing on the mating type and we'll talk about that but so yeah there is a sense of beauty and there's a sense of sexual appeal maybe that's a good and those intersect in fascinating ways we'll we'll talk about that okay we'll talk about all that but you're saying mating strategies not that we've kind of uh placed ourselves what we mean by mating mating strategies is one of the cool features that made humans what they are one of the initial inventions is is the weird uh weird and wonderful ways that we mate yeah and i mean if you go to even things like um how we compete for mates and this is another kind of strange for some people angle on it but mating is inherently a competitive process in that desirable mates are in secure supply relative to the numbers of people who want them and so even even post mating after that is after mate selection made attraction a mutual mate choice uh desirable that's why there's mate poaching mate poaching is one of the strategies that we in my lab with david schmidt have studied and so okay but one of the unique aspects of humans is that we compete using language and that is we have reputations and humans devote a lot of effort to maintaining their reputations to building their reputations to trying to recover uh reputations after uh a loss of reputation for various reasons but we we compete for mates um using language and that includes sending signals to the person that we're trying to attract using language um verbal fluency and you know obviously some more recent things like poetry but also we use language to derogate our competitors so one of the papers i published very early on it was a research project on derogation of competitors the the ways in which people impugn the status character and reputations of their rivals with the goal of making them less desirable to other people and humans do that and uh women and men both do that so it's an interesting thing that were male competitions we were talking about the yanamamo earlier and some of these overt physical or what what animal biologists call contest competition where there's a physical battle uh males do that and so a lot of the early attention on mate competition was focused on these sort of ostentatious overt battles in contest competition but we compete through language um and uh and so there's this big overlooked domain of women the ways in which women compete with each other using language and one of the things that astonished me is how observant women are about the subtle imperfections in their rivals and take pains to point them out so just just this is uh two random examples i went to a party this is back in in my youth but went to a party with uh my girlfriend at the time and uh and i got into this conversation with another woman who happened to be very attractive but um but then we leave the party and she said something just casually off-handed like said did you notice that um her thighs were heavy and i hadn't but next time i saw her this other woman i found my attention being drawn to check out her thigh well and originally it puzzled me why women would deregulate other women on appearance well they do it of course because men prioritize appearance but i thought well the man can see the woman directly with his own eyes why would verbal input alter his perceptions of how attractive he was and i think that part of it is i think there are actually a couple two quick answers to that one is the attentional one so our attentional field sure when they draw attention to it the those what could be very small deviations from perfect symmetry or whatever they are become magnified in our attentional field but the other is that um who we have as a mate is also a reflection of our own status um and and we you saw this in a kind of um overt and uh way in the uh the earlier the last presidential not the last part of the the uh 2016 presidential election where uh donald trump was saying this was when he was in competition with ted cruz i think in the primary he said look look at my wife look at ted cruz's life and wife and he really impugned the appearance of ted cruz's wife so using language you can alter the um the dynamics of the social hierarchy the status hierarchy sorry so like you can change the values subtly or if you have a large platform in big ways you can move things around just with your words yeah yeah that's right right and fascinating because it's all socially constructed anyway so this uh i mean the question i have is you said there's the interesting thing about mating strategies is there's a small pool of desirable mates and what the word desirable means is socially defined almost by on purpose to make sure the pool always stays small i would have a couple thoughts on that now it's an interesting issue set of issues you raise okay one is that we i think we have evolved adaptations part of our psychology is to detect differences um and so this is why um like a i don't know a a martian or an alien coming down they might look at humans and say boy they all look alike as one just like we look at i don't know zebras or whatever we think they all look look alike um but what's important in decision making especially in the mating domain or even friendship domain or or coalitional selection domain is the differences and and so i i noticed this just a concrete example of this uh i was sitting around this is again ages ago uh watching a um something like a miss america beauty contest and people in there with a bunch of other people and they were saying boy did you see miss north carolina what a dog and and so yeah this is astonishing so here are like a 50 contestants who are selected as the most attractive in their state presumably um although they claim it's based on talent um but um but we noticed the differences um and and uh and this is why i would push back a little bit on the term socially constructed because i think it's um there are many different meanings of that of that phrase and one meaning that some people have one connotation is that it's arbitrary and i don't think it's arbitrary so uh this has been another shift in understanding standards of beauty where it used to be believed in the in the social sciences you can't judge a book by its cover beauty is only the skin deep uh you know don't judge people on the superficial characteristics but in fact physical appearance provides a wealth of information about the health status of someone their in the case of males their physical formidability and we have formidability assessment adaptations and then fertility as well so there are a very predictable set of cues to fertility that have evolved to be part of our standards of attractiveness and and they're not arbitrary there are some culturally arbitrary ones so like you go to the the maori in new zealand for example and they find tattoos on their lips to be very attractive so there are some culturally arbitrary things um but standards of beauty like uh cues to youth cues to health uh in women clear skin uh full lips clear eyes lustrous hair um a small waist hip ratio that is circumference of the waist relative to the hips uh is a cue to youth infertility and and acute health symmetrical features so we are a bilaterally bilaterally symmetrical species but we all have we all have uh deviations from perfect symmetry that are due to different things so mutation load uh environmental insults diseases during development and so forth all right but that that's kind of deeply biological like there's cues that indicate something that is biologically true about a particular human so if we we'll talk about both men and women uh so we're now talking about what men want in the mating strategies when they look at women so you're saying small waist to hip ratio right is how much of that is our deep biological past on top of which we can build all kinds of different standards of beauty so you know we have many things going on in our brain our value of other humans in selecting a mate might uh incorporate a lot more variables as we get into the 21st century so how quickly does our valuation of a mate uh evolve relative to the evolution of um the human species they're using evolving the sense of culturally culturally evolved and then relative to biologically evolve yeah uh well i think that there are um there are some things that are biologically evolved some standards standards of attractiveness um and there are some of the things that i mentioned so in male evaluation of females let me back up and just say what is the underlying logic why would we have standards of attractiveness so um here's the interesting thing and this gets back to your earlier question about what is unique to humans or what distinguishes us or what set us off on the path that we did is chimpanzee males do not have any difficulty figuring out when a female is fertile she signals that like crazy with the bright red genital swelling uh olfactory cues she goes into estrus in humans we have and this was actually a third thing that i wanted to add earlier we have concealed ovulation okay relatively concealed ovulation which is remarkable given how close we are primatologically to to chimpanzees and so um uh there's there's a little bit of evidence that there are subtle changes that occur when women ovulate non women not on hormonal contraceptives but it's mostly concealed but it is it is largely concealed i think that's a feature of bug in uh like do we evolve that is that is that a cool and a powerful invention for the human species i think it's it's an adaptation in women that women have evolved concealed ovulation and i think it's a feature not a bug it gives more would it give more power for women to select a mate there are a couple different hypotheses about it but the one that i think is most plausible uh is that you know if again comparing it to chimps fema goes into estrus the male just has to try to monopolize her while she's in that estrus phase and then they basically ignore the females after that if you can't know when if when a woman is fertile then you have to stick around a lot longer and so i think long-term pair bonding co-evolved with concealed ovulation and with that also a very different form of sexuality which is that we have sex throughout the ovulatory cycle um and uh chimps don't you know there's there's a little bit of mating a little bit of sex toward the edges of the um ester cycle but but very little so that that actually makes mating a more fundamental part of um interaction between humans than it does for chimps so meaning like year-round every day i'm constantly selecting amazing in terms of biologically speaking so what else what else do men want today in the 21st century versus in the caveman days a wonderful question to answer it though i have to distinguish between long-term mating and short-term mating uh and in long-term mating it gets very complicated so as as a uh that's one way to put it yeah uh well well so i teach a course in in human sexuality at university of texas at austin and um one of the things this was back in the days when there were chalkboards and you and you taught with a piece of chalk and wrote things on the board and what i would do is i would ask the class i'd teach this the large class one to 200. i'd say what do women want tell me what all the things women want in a long-term mate and so i would start at one end of the blackboard there were like five blackboards and they said well i want a mate who's who's kind who's understanding who's intelligent who's healthy who's got a good sense of humor who shares my values and and i just go and fill five blackboards and then run out of space and and so you the first this large number of characteristics that people want and then specific magnitudes of those characteristics or or amounts so i say you you want a mate who's say generous with their resources and they say yes i what makes jennifer the research so i said so like a guy who this is a women's mate selection the guy who at the end of every month gets his paycheck and gives it to the uh local wino um on on the dragon i said well no not that generous okay generous toward me not not indiscriminately generous and so you want a mate who's um ambitious you know who's a hard worker yes but but not a workaholic you know and so uh and so then you get to interactions among different characteristics so there's a lot of characteristics a lot of variables in this very complex optimization problem for women yes that's right and more so for women than for men so and then i turned it to men and i say well what do men want and then i i run out of space after about a blackboard and a half because they they can't think of anything else so the women i think there's a lot of explanations for that besides the lack of the number of variables it's also you know um i mean that's interesting so what what's the difference between the variables so on the men's side what are the variables well they're in long-term base flexion there there's a lot of overlap sure okay um so things like intelligence um good health sense of humor um an agreeable personality someone who's not too neurotic or moody or or emotionally volatile but there are key differences as well and the differences stem from they basically fall on the delimited number of domains so for men it's physical attractiveness physical appearance and youth are the two real big ones okay men prioritize those more than women do and so that's why you have phenomena such as uh this quote love at first sight where sometimes men can walk into a party and they see a woman across the room and say that i'm going to marry that woman that's the woman for me women very rarely do that now most men do don't do that either but men are much more inclined to fall in love at first sight that's because they prioritize physical appearance why because physical appearance provides that this wealth of information about a woman's fertility status and this is from from an evolutionary perspective from a purely reproductive perspective in in a business school they would call it job one job one is you have to select a fertile mate so those who in our evolutionary past who selected infertile mates so post-menopausal women for example um did not become our ancestors so we are all the descendants of this long and unbroken chain of ancestors who all of whom success succeeded in selecting a fertile mate but fertility cannot be observed directly uh it can't use some cues exactly and and there are cues that are probabilistically related to this underlying quality of fertility that we can't observe directly and we're doing that computation in our heads what about men what do men want for short-term mating well so for short-term mating um for both sexes uh physical appearance uh looms very large so so inc so women are no physical attractiveness and appearance they're important for women in long-term mate selection so i don't want to um mislead anyone on that they're just not as important as they are for men um and so a lot of characteristics come for women before physical appearance physical attractiveness um so women so if we switch to women what do women want they want also physical appearance for short-term mating yeah phys physical attractiveness what else uh well some cues that represent physical attractiveness that maybe represent health well here's this is your i'm learning a lot here yeah well so but you're also asking a very interesting question about uh what is a controversial within the evolutionary psychology field right right and not totally resolved so that's why you're on the sixth edition of the book and there could be a lot more additions coming yeah i revised it every four years or so because there's four years of um new interesting work and so it deserves updating but the traditional i should say uh answer to your question is that women go for good genes cues to good genes in the short term and cues to resources in the long term and this has been a hypothesis that advocated i didn't come up with this this one um by um steve gangstad a former student of mine marty hales and randy thornhill and some other um very smart players in the field and um and what they used as uh markers of good genes are things like symmetrical features uh and masculine features so strong jawline high shoulder to hip ratio you know other other sorts of masculine features but i started to doubt this explanation for what women want in the short term because of some other findings so for for women a lot of short-term mating is not one-night stand mating so but rather it's uh a fair mating so uh so if you ask the question why do women have affairs so let's restrict the question for a moment my colleagues would argue well women have affairs because they're trying to get good genes from one guy while they're getting an investment from the regular partner the the husband okay but the problem is that when women have affairs uh 70 plus percent tend to fall in love with or become attached to their a fair partner now outside what percentage 70 yeah 70 some large majority yeah 70 percent or more in contrast to men where it's more like 30 percent of men who have affairs fall in love with or become attached to their fair partner so but from a design perspective um an engineering perspective if you will uh that's a disastrous thing if you're just trying to get good genes so you're trying to retain the investment of one guy yeah while getting good genes surreptitiously from this you know guy who presumably has more falling in love with them becoming attached that's that's not a feature you want yeah it's bad engineering yeah exactly it's bad engineering and so and so i developed a an alternative uh hypothesis that i call the mate-switching hypothesis which is that um affairs are one way in which women divest themselves of a a cost inflicting partner or a partner who things aren't working out well with and it's a way to either transition back into the mating market or to or to trade up in in the mating market uh and and so and anyway so these are these are probably the two leading hypotheses about why why women have affairs and i am putting my money on the mate switching hypothesis um my esteemed colleagues are putting their money on the good genes hypothesis but i think the evidence for the good genes hypothesis is starting to um look shakier than initially but this is a heated debate i mean made squishing sounds like a so from a game theory perspective from an engineering perspective seems to make a lot more sense unless you put a lot of value in lifelong sort of in the long term mating uh some kind of value in the um lifelong singular relationship like monogamy yeah and maybe we do psychologically maybe there's a big evolutionary advantage to that and we we do but we also know that divorce is you know um and breakups are are also common that occur in all cultures so yeah um we're just not very good at this thing well either we're not good at the mate selection such that uh maybe we're we're not incorporating all the variables well or we're just not good at monogamy period from an evolutionary perspective well i think they're that's a debate no that's raises an interesting set of questions so i think that i mean one issue is is longevity so i mean we didn't live to be 70 80 years old and over 99 of human evolutionary history and so we didn't necessarily evolve to be mated monogamously with one person for decades and decades and decades but i also think that long-term peer bonding is a critical strategy but mate switching is also a critical strategy so if you have a mate for example who becomes cost inflicting or becomes sufficiently debilitated or who suffers an injury such that like in hunter-gatherer societies where the mate can no longer hunt can no longer provide resources for their kids and and and the woman this becomes this becomes a problem and so uh and so i think that we have adaptations to mate switch and to divest ourselves from some partners and trade up in the mating market under certain conditions so okay and those conditions will differ from men and women what are some of the cues in terms of what women want um you know i'll go to the gym so a hotly contested debate you said evolutionary psychology and this is uh in the uh bro psychology forums that i visit uh multiple times a day and no i'm just kidding uh what what what's the most important cue of appearance for guys um what muscle group is the most important to work on do women care about biceps is what i'm asking in terms of physical appearance um uh a a good um shoulder to hip ratio so relatively wide shoulders relative to hips um is is one women tend to prefer men who are uh physically fit and well toned but not muscle bound so like if you go to oh i don't know someone like those early when arnold schwarzenegger was doing the mis mr whatever it was contest you see the women don't find those attractive the extremely muscle-bound guys but they like a guy who's physically fit high shoulder to hip ratio they like guys who are physically taller than they are and guys who are a bit above average in in height so if the average so if uh you know the average is i don't know five nine five ten and out there for humans depending on the culture women prefer uh an inch or two taller than that um so um so shoulders height dad bod wha what's that about why don't why why do you want a dad by what why do you why why not how do i define wait what is a dad bod dad bot is not muscle-bound okay so out of shape a little no no no just a little bit a little bit of uh uh cushion for the pushing i don't know what the kids call it these days uh but just a little bit a little bit of fat so what's why do they not want guys to be obsessed with their body is that or is that some evolutionary thing yeah i think that um women might interpret a guy who is so obsessed with his body that he's uh they might view that as a sign of narcissism yes um and that's not a good trait uh what about like cultures where large sort of overweight men are valued is that how do you explain like how much can we override the evolutionary desires with our sort of cultural fashions of the day that maybe represent other desirable aspects like wealth well wealth is resources have always been important um especially to women so is a man able to acquire resources and is he willing to dispense them to her and her kids so that's always important in traditional cultures that boils down to hunting skills so if so i have to call a friend kim hill who's uh probably the world's leading expert on the aceh of paraguay and uh and you ask him like what what leads to high status in the aceh in males hunting skills that's that's nice one the one thing the big variable and that's resources and that's resources now what's what's interesting about modern culture is we have cash economies but cash economies are relatively recent and you know historically there's over the vast uh 99 of human evolutionary history you weren't able to stockpile resources in the way that you are today um although there are interestingly certain ways you can do it so so like you you kill a large game animal okay you bring it back you get some status points because you give some to your family you can share it more widely with the group etc um but um but it's going to go bad right you can't just say i'm going to keep this carcass around for the next several months okay but and and i think i think it's a steve pinker who might have used coin this phrase that they they store the meat in the bodies of other people and so for example they store it in their friends so you know um hunting success is uh you know it's it's a hit or miss kind of thing so you might come back empty-handed four times out of five but and but when you do you share your meat with others and then when you know and then they reciprocate by sharing their meat with you and so and so you can store resources in the bodies of other people which is i think an interesting way to think about it but that can only go so far and when you have cash economies you have both the ability to stockpile resources but also this kind of explosion and inequality of resources and that's evolutionarily recent what about now this is the difference between the hubermann the excellent huberman lab podcast that you did that people should listen to he is a brilliant scientist a um sort of uh a rigorous analyst of what is true in the scientific community also helps you with great advice on how to live now in contrast to that i am a um a terrible uh uh almost idiotic level journalist so this is what you have to deal with another thing that people talk about that women care about is penis size does penis size matter for women in sexual selection well um there's controversy about that in the evolutionary psychology community well is there papers on penis size i wouldn't say a scientific paper so speculations about in nature or in science yeah yeah no nothing nothing that i've seen there um you know i i think that there's individual variability um so uh this is something that comes up again you know when i ask women in the class my classes you know what do women want some will say you know a large penis but i think there's variability um in in that preference and it also might depend in part on the variability in the woman's anatomy so um do you think there's something fundamental in terms of evolutionary psychology in terms of evolution or is this a quark of culture that's current that's maybe somehow connected to pornography or something like that yeah my my guess is it's it's something that's uh perhaps a quirk of culture or or something that is evolutionarily recent um but um but but i don't know i mean it's it's a topic that hasn't been explored much i've never done work on it and well somebody should do a phd uh sort of some archaeologist should do a phd on the history of human civilization and its evaluation of penis size and the correlation of penis size to the value of the male okay moving on another absurd question in terms of what men want again definitely not a huberman lab podcast question why do men let's say a large fraction of men love boobs well uh i think that uh you're one of the uh most cited evolutionary psychologists and this is what you signed up for this is these kinds of questions questions like this yeah well so again this is something i haven't studied directly but um uh scientifically yes yes uh but um but yeah there's been some work on that and and it's uh another cultural quirk perhaps no i don't think it's a cultural quirk because i think it's the uh the shape that matters a lot because shape is going to be a cue to fertility and so one of the things that humans are attracted to in the opposite sex is sexually dimorphic features and breasts are a sexually dimorphic feature and dymorphic mean difference between difference in morphology between males and females got it um diamond to morphic morphology uh so um and women don't develop uh breasts until um puberty or post-puberty uh and and so uh as a sexually demorphic characteristic we tend to be attracted that same is true by the way with the waist-to-hip ratio that we mentioned earlier uh prior to puberty males and females have very similar ways to ratios but at puberty um there's a differential uh hip development and fat deposition that creates a sexual dimorphism uh with respect to waist-hip ratio and so again that's men are attracted to this wasted ratio that no man consciously says that they find this woman more attractive than that woman they don't think ah she has a waist up ratio 0.70 that's exactly what i do but most men most men yes so isn't that fascinating that we just build these entire industries the fashion and what we find beautiful around these kinds of ideas and we just and then not just not just fashion and then we build uh we have uh sociological tensions about whether we should care about this kind of thing or not there's there's battles in that space it's it's like they seem so simple it's just the human body and we wear clothes first of all that's that's a funny thing what what's the why are we wearing clothes what's the shame aspect yeah of covering up the body is that another feature or is that what is that yeah that's a that's a that's an interesting question and i i don't know it's just like hiding uh ovulation maybe that's another hiding like uh maybe hiding is a great game theoretic thing to play with because it can give you it can give the powerless more power by covering well well maybe well i think there are a few things so one is the sort of arbitrary features of fashion and then the other is the aspects of fashion that attempt to um magnify are what is inherent in our evolved standards of beauty so for example um women tend to wear things that accentuate their waist hip ratio so i mean historically those in the old days corsets for example cinch the woman's waist and you wouldn't see fashion develop in a way that made a woman seem old unhealthy pock marked signs of open sores or lesions there are certain domains um design spaces that you wouldn't that no culture would develop um so but there are arbitrary features but sometimes they're not entirely arbitrary or they're arbitrary at one level of description but not another so for example fashion tends to be linked with status and that's why it constantly changes the high status people start wearing a certain type of clothing and then when the lower status people imitate them then they have to shift to signal their status and so i think the fashion and clothing is important linked to status so this is not you talking this is me i just want to make a a statement a profound statement that i think yoga pants now this is broadly speaking but yoga pants is one of the greatest inventions in human history there's fire and i'm just going to leave it there i'm a fan um and i have uh female friends that talk about how comfortable yoga pants are which is what i'm referring to when i say it's one of the greatest inventions because comfort and fashion is really um really important to me let me ask about sort of the sociological aspect of this so i've um i've talked to mark zuckerberg who uh the meta who's the ceo founder of facebook and now meta and owns i've heard of him yeah he's a yeah he uh he uh holds the american flag and likes the water anyway um so there's been criticisms of social networks and so on and i just want to ask you about the broader question here that there's uh object objectification of the human body in the media and that creates standards for young women for young men perhaps but more young women yeah um you mentioned to the cruelty that women can have towards each other in terms of well let's you know cruelty is already a moral judgment just you've made a statement about the fact that women uh seem to point out imperfections in other women um do you think it's a problem in our modern society that we objectify each other in this way do you think this is this is a fundamental aspect of our biology that we need to um suppress versus celebrate just like we might suppress our natural desire for violence if such exists um in modern society well a couple couple thoughts on that i i think it is um damaging um the uh the fact that uh so many images are displayed in in social media and so um what i would say is that there's what's called in in the field uh an evolutionary mismatch so we evolved in the context of small group living where there was make competition but your competitors were a small number of other potential individuals and so people do comparisons um okay but now what we have is uh this bombardment bombardment of our visual system and our sexual psychology and our mating psychology with with thousands and thousands of images uh that are not at all representative of who our actual competition is in in in the mating domain and so i think that um and there's actually evidence on this that um uh baz luhrmann actually said something like this in his uh sunscreen song i don't know if you've ever heard that but it's like i said it's a wonderful like string of advice song about advice but he says uh oh yeah yeah okay yeah he says don't read beauty magazines that will only make you feel ugly you know i think that there's truth to that that is especially with with women they look at all these images and you know of course they're photographed they're photoshopped uh they're they're highly selected and and not at all representative and so women compare themselves to that so i think this social comparison is an evolved feature of humans i mean males do it females do it but it's exacerbated in the modern environment in wildly evolutionarily mismatched ways and so i think i think that it is it is destructive it's harmful there's evidence that um it hurts women's self-esteem so here's just another uh factoid or fact if you will that at least in western cultures uh males and females have roughly the same overall average levels of self-esteem but once uh puberty hits all of a sudden women's self-esteem starts to drop and i think it's because when they enter make competition then they start elevating the importance they attach to physical appearance and then as you point out the the tremendous objectification that saturates social media and media in general is um it's damaging and harmful i don't know how to undo it though i don't know how to design a society that um that undoes that well one of the ways we undo things just like you pointed out is we use words when we manipulate society we manipulate social and status hierarchies using our words for ill and we can do the same for good and that's why there's a lot of click-bait articles about uh you know instagram um hit you know leading to a lot of suffering amongst uh teenage girls and all those kinds of things um i'm criticizing the clickbait bait nature and not the contents of the articles but you know and those articles hopefully become viral in a way that makes us rethink about how we build social networks that kind of allow us to to easily misrepresent how we look when we are quote-unquote influencers and what a mental effect it has on the um on young people that look up to those influencers but i guess you're it's not the objectification fundamentally that's the problem it's the inaccurate it's the fake news it's the yeah that's misrepresentation you still objectify uh the male body the female body but you do so uh while misrepresenting the actual truth and and so you're moving the average you're moving the standard representation of what a male should look like what a woman should look like and uh the dishonesty is the problem not the objectification here's just one other interesting empirical finding on that and it has to do with another dimension that i think is harmful and and that's the thinness dimension uh and so if you and these are studies originally done by paul rosen but they've been replicated where if you ask men okay what is your ideal figure in a woman and so they have these say nine figures that vary from very very thin to average to to plump men give it the midpoint they say the the the midpoint is in relative thinness or plumpness is what i value and you ask women what is your ideal body type for you they give it they say thinner but then if you ask them what do you think males ideal body type is they put it in exactly the same spot that they put their own idea which is thin and so there's actually an inaccurate perception of how thin men desire women to be uh and i think that's partly exacerbated by the the fashion industry where the the models are often real thin and you know they're the lure is that clothes hang better on thin models and then on tv they say you gain 15 pounds over what you really are or whatever but for whatever reason women misperceive how thin men want them to be and so you have this is another huge sex difference is eating disorders anorexia for example bulimia binging purging where these these disorder eating disorders are nine to ten times more common in women than men can i just take a small tangent because it is such a beautiful uh the sunscreen song such a beautiful one if i can read some of the words from it yeah i i really enjoy it yeah it's great it's a great song for people you should check it out it's called everybody's free to wear sunscreen i guess it's actually a speech to a class i don't know if that's artificial or real but it's it's a speech that gives advice and it goes ladies and gentlemen of the class of 97. i just remember it even now those those words where's sunscreen if i could offer you only one tip for the future sunscreen would be it a long-term benefits of sunscreen have been proven by scientists whereas the rest of my advice has no basis more reliab
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