If the more words there are for a kink marks its popularity, then piss is right up there. Watersports (WS) is a yellow line that seems to get crossed a lot. A golden shower has been popular for a long time, the Greek word urolagnia means urine lust - those Greeks were a naughty lot!  Piss play is a great way to mark dominance, and drenching a lad in recycled beer he just purchased is very horny. Streams Of Pleasure. 

There’s a few post you could read, but start with: Blow&go with ws