I'll "manspread" if no one is trying to sit near me. Its not that I can't put my legs closer together (though I cannot bring my knees together without discomfort and forget crossing my legs at any place higher than the ankles), its just so much more comfortable not to. It isn't even a conscious decision; I just naturally try to be as comfortable as possible. It has nothing to do with "presenting" myself or "claiming my territory", which are the criticism I hear most from women. If someone is looking for a place to sit, I'll assume a more polite position. If I'm on my own and there are plenty of empty spaces, I won't sit in an uncomfortable way just because someone is projecting their misconceptions of masculine power-performance.
To be fair, it is incredibly rude to take up more than one seat when people are trying to sit there. Also, those pricks who cross their legs and suddenly their shoes are marking up your jacket or jeans. I like to think that there are special places in hell for those people, a place where you have to sit on a plane in front of a kick-happy child on sugar and behind a snoring man in full recline.
To be fair, it is incredibly rude to take up more than one seat when people are trying to sit there. Also, those pricks who cross their legs and suddenly their shoes are marking up your jacket or jeans. I like to think that there are special places in hell for those people, a place where you have to sit on a plane in front of a kick-happy child on sugar and behind a snoring man in full recline.