That the vagina is way lower than a lot of people depict it. A lot of my anatomy exposure when I was younger was hentai, and it turns out hentai artists don’t really know where the vagina is either. The ones that put the vagina as the little sister of the belly button on the woman desperately need to look up their Year 9 health book.
Guys who refuse to wash their arse because it’s “gay”.
The sheer amount of self-hatred, insecurity and homophobia caused by toxic masculinity and shitty upbringings is astounding that you’d rather have swamp ass than be worried you’re gay.