Darby Saxbe

There's a lot of methodological issues with oxytocin.

I talk about that a little bit in the book.

But what's interesting is like both men and women early in parenthood have really similar levels of oxytocin.

So we think of oxytocin as this like mom hormone.

And it's not really like you see it in dads, too.

Exactly.

Like you can take blood, you can take saliva, you can take hair.

And then you can do like what we did is we put dads in the MRI and then we show them videos of their baby.

So it's like not quite like I actually really when I was developing this study and I pitched a couple people on this, I really wanted to do smell-o-vision.

Like I wanted to pipe a baby's smell.

through a tube into the scanner.

Like I thought we could get onesies from babies and then it would be like a mix of own baby and other baby.

I think we probably could have done it.

But at that point, we had so many moving parts in our scan protocol that I was like, this is going to drive my team insane.

Yes.

So that is really changing.

So I want to say like the number of boomer men who said they'd never changed a diaper was like pretty considerable.

Just step on up.

But it was like a surprisingly big chunk.

And that number is now really small, if you ask Gen Z men.