I’m constantly amazed that this is a hard subject for people. As the golden rule says:

“I’m not going to reach into your pants, without an invitation. And I prefer no one reach into my pants, because we barely know each-other. Whatever someone tells me is in their pants, I’ll take their word for it, as long as they haven’t flashed me in public. Also, shitting in practically transparent stalls is awful for everyone, and showering with strangers sucks. Let’s all just do less of both.”