A real (very old) funny story on this "piss-matter" from the Russian campus...
Once a transport aircraft had to land somewhere on the route because of a terrible weather at the destination point. The crew was told that they would stay there for more than a day. As there was nothing to do in the middle of nowhere they started consuming spirits, until losing conscious. In the middle of the night one of the crew (yet in somnambulate state) decided to go to toilet but opened a wardrobe in the darkness and just pissed somewhere down, into the co-pilot's shoes.
No doubt, there was some fought in the morning and both guys were finally left quite angry at each other. After the plane returned to the base the pilot submitted an official report to the station commander applying that because of "psychological incompatibility" in his crew he needs substitutions to be made.
The commander's written resolution was fascinating, smth like (his original language was more offensive than the one that follows): "F.. your psychology and you all, I have no time and staff to deal with such childish issues. Let X piss into the Y's shoes in return and get the problem closed" .