A human urinal is something like a human toilet. Mostly men are used as a human urinal. It is some kind of a dominant game. The mistress drinks lot of water or other drinks until she has to pee very urgently. But instead of using a normal toilet the mistress uses the slave to empty her bladder. The slave has to open his mouth and drink the pee. Often the pee is directly pissed into the mouth of the slave. But sometimes the mistress uses a glass, empties her bladder into it and then orders the slave to drink the glass empty. Because of the dominant aspect slaves are often punished if a drip of the pee lands on the ground instead of the glass or mouth of the slave.

Sometimes the pee is also offered as a reward for the slave because there are lot of slaves who like to drink the golden liquids. So the pee is also called champagne!