Well, I don't see why they're doing it buck naked if they're shaving their faces, but I think it's a little silly to be upset by guys shaving (their faces) in the bathroom. My bathroom is being renovated right now and I have no shower, mirror, or bathroom sink right now so I'm shaving at the gym. I either have shorts or at least a towel around me though. I'm rather modest. And when I went to the gym before work, I always worked out then showered and (when needed) shaved before going str8 to work from the gym.