Not everybody is comfortable being naked in front of others generally, and that's okay, but straight men who genuinely fear the possibility of simply being visible to gay men need therapy. The assumption that everybody is just going to be ogling everyone else just doesn't hold up to reality where there's a very long history of people being naked in locker rooms, showers, bath houses, beaches, saunas, etc. while still being polite and respectful of each other. That isn't to say that rude people have never existed, but that is far from the norm and nothing to be fearful of.