JD88099: there are only 3 situations where a man should touch the zipper of his pants ...
1) he is standing AT THE URINAL
2) it mysteriously went down and he needs to pull it back up before the sweet old lady that bakes you cookies walking towards you sees it
3) he is taking it out for his partner...
I have a very strict set of bathroom rules that i follow...
-- No talking with other men no matter what
-- if an emergency occurs, and you are both in the same position (both waiting in line, washing hands, standing at urinal, etc.), no turning halfway around in mid-piss to talk over the shoulder, then talking is ok.
-- giving another man a friendly nod in public is of course perfectly fine, however a bathroom is absolutly NOT a place for nodding.
-- no talking through stall doors/walls
-- no handing things under the stall doors/walls
-- NEVER pull on a stall door if it's closed. when sitting down in a stall, it's best to tap your foot when you hear someone coming, or perhaps a quiet cough, so everyone is aware that the stall is occupied. there is nothing worse than someone shaking the door to my stall when i am trying to take care of business. it ruins my week.
then there are more basic rules such as avoid eye contact, inhale sparingly and quietly , etc.
maybe im just wierd though :-\