There is a Public Transportation Etiquette thread...I think there should be a bathroom et thread, and that this should be it (if there is one already, I apologize).
Two contributions, both odd habits I've noticed in Korea.
1. Before beginning to urinate, men will spit into the urinal. It's a disgusting habit in a disgusting place (public restrooms, not Korea). I've a friend who has lived here for about half a decade; he got into this habit. It got so bad that he developed a Pavlovian response to urinals. Every time he saw a urinal, regardless of whether he needed to go to the bathroom, his mouth would salivate. He told me this after I mentioned that I had begun spitting in urinals occasionally. I don't any more.
2. The second is another disgusting urinal habit. I don't smoke cigarettes, but I've noticed that people often look very satisfied when they do. I do find urination satisfying, and I doubt I'm alone in this. In Korea, men have combined the two, urinating while smoking cigarettes. For this reason, you will often find urinals with several to even a few dozen butts on, in, and around them. A few places include ashtrays mounted on top of urinals.
A snapshot of a makeshift ashtray. What is seen cannot be unseen (though the picture is low quality...it was very gross in person).
Warning: Spoiler! (Click to show)
