That's not good, I know when I was in school quite a few guys used to get erections in the showers, one guy used to openly play with his all the time, a few times when there was a few of us who were friends in there we would join in
I’ve always stayed flaccid, but couldn’t help checking out the other cocks. Same at public urinals. Probably the high point was taking a piss next to a coworker who is a total asshole. It was great peaking over and seeing his super skinny dick!