I just got reminded of one you guys should get a laugh out of: Inappropriate public men's room sounds!
Acceptable public men's room sounds: Burping, farting, #2 sounds, clearing your nose, peeing, flushing
Unacceptable public men's room sounds (keep in mind, most of them are giant echo chambers):
1. Whistling/singing - Just don't do it! This isn't a place for you to come in whistling Zip-a-dee-doo-dah! If you come into the men's room whistling or singing then you are WAY too happy about being in there plus you are disturbing the concentration of others who are trying to do their business in peace.
2. Excessive chatter - This isn't the lady's room, take it outside! And for goodness sake don't try to strike up a conversation with a stranger at the urinal next to you!
3. Wheezing, sighing, grunting, etc. while going to the restroom. I don't know what spicy food you at but suck it up and go in quiet like a man!
4. Any loud chewing, smacking or whatever noises with your mouth. Like I said, its a big echo chamber and that just sounds disgusting.