What does gender have to do with makeup or what clothes you wear? Nobody bats an eye if I'm out and about with a dude in makeup.

Urination is a big deal for women. They gotta sit, squatting can be messy, and that means reliance on public restrooms, which are generally disgusting even for the men's restrooms but women are dirtier. And women are slow so there's lines.

You may have noticed women in public often watch what they drink so they have to don't piss a lot since it's inconvenient.