It's mainly a question of personal standards, IMO.
I've seen a few avatars here on this site that have made my eyebrows fly straight up off the top of my head and stick to the ceiling.
Fortunately, while I was looking for a broom to knock them down with, I ran across my fan and smelling salts . . .
After all, what's it to me if someone wants to put his/her/their bits on display?