I remember showering with the other men in my group nude in summer camp when it was our turn. I made a point of it to not stare at other guys' dicks or butts for fear of being accused of being gay, only to learn that doing that is the dead giveaway, since everyone else looked at everyone else out of curiosity. I also remember turning in for the night on the first night, one dude said it would be cool if we could each have a good-looking lady with us in our sleeping bags, and I chimed in that I didn't want one, so someone else could have two. Long awkward pause, laughter, and the "rhymes with hag" tag stayed with me.
The camp counselors weren't showering but were looking at all of us to make sure we were all getting clean and not messing around by cupping and throwing water at others. Nobody thought twice that what they were doing was anything other than normal.