William Costello

Yeah, you're right.

Differences between the sexes.

So one of the biggest personality differences is the people versus things personality difference.

Women tend to be more interested in people and social relationships, and men seem to be more interested in things, objects, tinkering with how they work.

In terms of sexual psychology, massive differences between the sexes there.

And the way we describe it is that where the sexes faced similar selection pressures throughout our ancestral environment, so then we would expect them to be the same.

So we both face the problem of getting food into our body to fuel our body in the exact same way.

So guess what?

Men and women treat food psychologically pretty much the same.

Same problems, no major asymmetry of difference between the sexes there.

Sexual psychology is a radically different ballgame for women versus for men.

Women have far greater obligatory parental investment.

So sex is a far more risky endeavor for women or has been ancestrally for sure.

They may get pregnant.

They may have to be stuck with the child, have to breastfeed that child.

Infant mortality was massive throughout our ancestral history.

It's a huge success story of recent decades, how much we've improved that.

But it was a risky endeavour.

The minimum parental investment of a man is one successful sex act, which I'm reliably told can be accomplished in a number of seconds.

So it's a massive different ballgame.