The belief commonly held by all men that while most urinals have dividers that provide privacy, it is more polite to select a urinal at least one away from another person. The farther away your urinal is from the nearest occupied one, the better. This belief can also apply to stalls, and therefore women as well, although not as commonly as with men.
"I went into the bathroom and there was another guy in there using the urinals, so I took the one farthest away from him. Just following good urinal logic"
by Animal Damage October 1, 2013