Ok, here's a weird little one. I stumbled across a YT video that talked about a difference between male arms and those of females and trans women.
Apparently if a guy drops his arms by his sides and then turns his palms outwards he can still lay the side of his hand flush against his leg but girls can't!
Sooooooo.....of course I HAD to get up and try it

Hmmm, no way I can get my hands anywhere near my legs when I turn my palms out.
So give it a go:D
I don't know any guys I can get to try it, so no way to compare, maybe you can. I'd love to know:)