Dr. Bill von Hippel

Yeah, yeah. And it rarely changes. So there's analyses of like every Playboy bunny from 1950 to whenever, I don't know if Playboy even exists anymore. And they always had the exact same ratio, even though the actual weight of the model would have changed dramatically. They went from pretty heavy in Marilyn Monroe's day to really, really skinny for a while, and then back to heavier again.

Yeah, yeah. And it rarely changes. So there's analyses of like every Playboy bunny from 1950 to whenever, I don't know if Playboy even exists anymore. And they always had the exact same ratio, even though the actual weight of the model would have changed dramatically. They went from pretty heavy in Marilyn Monroe's day to really, really skinny for a while, and then back to heavier again.

In principle, it doesn't matter much. I mean, remember, but there's your phenotype. You want to be well taken care of. But as far as what you're actually attracted to... So women – so we call it sexual plasticity, that women have evolved to basically be able to find almost any guy attractive because the qualities that are going to make men successful are often on the inside.

In principle, it doesn't matter much. I mean, remember, but there's your phenotype. You want to be well taken care of. But as far as what you're actually attracted to... So women – so we call it sexual plasticity, that women have evolved to basically be able to find almost any guy attractive because the qualities that are going to make men successful are often on the inside.

Because remember I told you all men are fertile even when they get really old. So a skinny guy, a fat guy, a strong guy, a weak guy, they're all fertile. You don't have to worry about that. But what you do have to worry about is raising kids is really hard. You want help. So you want somebody who's going to be successful in hunting. You want somebody who's going to look out for you and your kids.

Because remember I told you all men are fertile even when they get really old. So a skinny guy, a fat guy, a strong guy, a weak guy, they're all fertile. You don't have to worry about that. But what you do have to worry about is raising kids is really hard. You want help. So you want somebody who's going to be successful in hunting. You want somebody who's going to look out for you and your kids.

These are the variables that really matter. And so women look for that. And that means they need to be able to fall in love with, you know, the Bill Gates of the world who aren't these big macho guys but can really take care of you. And so women have a lot more of what we call sexual plasticity than men.

These are the variables that really matter. And so women look for that. And that means they need to be able to fall in love with, you know, the Bill Gates of the world who aren't these big macho guys but can really take care of you. And so women have a lot more of what we call sexual plasticity than men.

Men have a particular shape they're looking for and a particular appearance on average because that correlates with fertility. Now, if you then have a choice, oh, here's one who's poor and here's one who's rich, you're going to go with the one who's rich, right? But if you look at male rock stars and male businessmen, people who are really rich and famous, the women that they date and marry –

Men have a particular shape they're looking for and a particular appearance on average because that correlates with fertility. Now, if you then have a choice, oh, here's one who's poor and here's one who's rich, you're going to go with the one who's rich, right? But if you look at male rock stars and male businessmen, people who are really rich and famous, the women that they date and marry –

are entirely across the social class spectrum. Some are super rich, some are super poor. A waitress has a great chance with Mick Jagger, and so does some high society elite person. But if you turn it around the other way, a waiter doesn't have much chance with this rich female or rock star sometimes, but way less likely.

are entirely across the social class spectrum. Some are super rich, some are super poor. A waitress has a great chance with Mick Jagger, and so does some high society elite person. But if you turn it around the other way, a waiter doesn't have much chance with this rich female or rock star sometimes, but way less likely.

And that's because women are looking for features of status and dominance in men, and men don't care about that as much in women.

And that's because women are looking for features of status and dominance in men, and men don't care about that as much in women.

So homosexuality is a really interesting question. We see it across the animal kingdom, so we know that we're not the only species who does it, but we don't often see exclusive homosexuality in the animal kingdom. That seems to be much more common in humans.

So homosexuality is a really interesting question. We see it across the animal kingdom, so we know that we're not the only species who does it, but we don't often see exclusive homosexuality in the animal kingdom. That seems to be much more common in humans.

Nobody's 100% sure why it is, but the best evidence I've ever seen, the best evolutionary evidence, comes out of this lab of a colleague of mine, an ex-colleague of mine, Brendan Zeach. And what he shows is that Most human behaviors are driven by a number of genes, not just one. We call them polygenic.

Nobody's 100% sure why it is, but the best evidence I've ever seen, the best evolutionary evidence, comes out of this lab of a colleague of mine, an ex-colleague of mine, Brendan Zeach. And what he shows is that Most human behaviors are driven by a number of genes, not just one. We call them polygenic.

A whole bunch of genes contribute to a particular behavior, and especially a complex behavior like homosexuality. And so there's going to be a polygenic score for homosexuality. And the higher your polygenic score is, the more likely you are to be attracted to same sex. And it works a tiny bit different in men and women, but basically the same.

A whole bunch of genes contribute to a particular behavior, and especially a complex behavior like homosexuality. And so there's going to be a polygenic score for homosexuality. And the higher your polygenic score is, the more likely you are to be attracted to same sex. And it works a tiny bit different in men and women, but basically the same.