There is no proof of a soul, yet every single culture and religion, irregardless of distance apart, believe in one, in one form or another. Did our ancestors know something we don't?
Madness string 96951
Based on the name and this situation, I assume a piss disk is when you pee into a shallow saucer, freeze it and then slide the frozen disk under a door so that it melts later and forms a pool of urine in someone's apartment.