You know…it takes a certain amount of muscular tension to keep your legs together when sitting. So understandably it’s more comfortable to let them spread. Girls learn to keep their legs together for reasons of modesty. Guys apparently don’t learn the same practice for reasons of courtesy.
I don’t know how it is for young people now, but I think young women used to take it for granted that a lot of choices they made for the sake of propriety, custom, fashion, and personal attractiveness were going to involve some discomfort. High heels. Bras. Remember girdles? We used to sleep on rollers, for goodness’ sake.
In contrast, I think young men tended to assume that comfort was their natural-born right, and if something was uncomfortable they didn’t have to do it. Such as tucking their knees in if they were taking up half the space allotted to the person next to them.
Maybe that part hasn’t changed.
Or am I wrong?