You’re a man, and you wonder why men “manspread”?
Firstly, I think the term to be sexist. It’s irritating and exasperating why a man—who should know better—would bring up this nonsensical term. I can understand this coming from ignorant feminists, but you should know better.
The answer to why men part their legs more when seated is entirely down to anatomy.
Men have relatively narrow hips, and plant their feet wider for balance. Taller men may “manspread” more because they have longer legs. Would you rather men wobble around like weebles whilst seated? Because that is the alternative.
Then there’s the fact that we man have dangling genitals that need some damn space. You do have genitals, right?
And for those so bothered about space being taken up. I presume you have the same complaints about fat people?