If there are tests for homicide departments to see if there is blood, i figured there is a way to see if there is urine as well. The reason i ask is a strange one. My guitarist has recently told me that our drummer took a piss on my bass. I have no idea why anybody would do something like this, so for now I'm giving our drummer the benefit of the doubt. Also, the guy that told me is a compulsive liar. I believe him thougbh because he swore on his mothers eyes that it was true, and I would like to know if there is actually piss on the back of my bass. Does anybody know?