J.W.
I really don't think there is anything that my kids could do that would gross me out. I am pretty much numb to it.
Even the girls get into the game. My older daughter went to an all girls high school, they used to have leg hair growth competition. Pretty much all the social norms driven by boys went right out the door. About the funniest thing was when a freshman was picked up by their hot older brother, the girls would stand behind the bushes so that they boys wouldn't see the awful state of affair their legs were in.