This is an anthropological study (sorta) about male restroom behavior.
It is based on observational and experiental evidence.
If there is nobody using a urinal, the male will choose the one closest to the door. If someone is using a urinal, the male will choose the one farthest from the urinal currently occupied. So if there is an odd number of urinals in the restroom, the male will choose the one closest to the door first, and the one farthest from the door second. If both are taken, the male will pick the urinal that has the most distance from both other parties.
Should the male have to use the urinal next to the one currently occupied, a specific protocol is followed. The male will stare at the wall in front of him and create an invisible barrier between him and the person(s) around him. At NO time will he attempt to view the other party(ies). Some light conversation has been said to take place, but hasn't been verified.
Men using stalls do not exhibit this behavior, but will not ask for toilet paper.