I think it was kinda strange that you said wee wee than you said 'junk' in the same paragraph. Rocky has it pretty well summed up it is a general instinct in male minds that there is that boundary in the toilets and as soon as two guys are in the same toilet room they silently unknowingly take that agreement mentally between each other, and Rags is right when it is crowded it is usually when you are in a pub or club etc and every one is to drunk to care but of course there is still that mutual agreement anyway when you are drunk you to busy trying to concentrate on doing your business than worrying about everything else.