There’s alot of truth with this…my sibling has daughters and I have sons so we talk about this alot. Although I think there is some pressure by young men to be buff, to not have zits, to dress a certain way…to be in pictures doing interesting things just as for the girls buy in general boys spend less time on the selfies.
I think now that the emo trend has whined you see less of the waif oh so sad stuff.