Father of Pearl
When you cum in the shower, and the ejaculate forms small, pearl shaped clumps.
P1: Hey, did you get your girlfriend that pearl necklace she was asking for?
P2: Nah man, I let her jerk me off in the shower and gave her my father of pearl instead
P2: Nah man, I let her jerk me off in the shower and gave her my father of pearl instead