When I was in college, there was this one girl up on the girl's floor (which, was generally where the girls were when they weren't hanging around with the guys, and vice versa by the way) who had this large, sealed glass mason jar of about roughly two quart capacity.
Filled with sperm. It was a translucent, white, gelatinous mass with the consistency of molasses. She would pull it out at parties. She claimed it took over a hundred guys to fill it. Sometimes she'd help them, sometimes she'd just let them do it. It was kind of gross. Yet fascinating. Responses to viewing this thing ranged from "Eww, yuck!" to "Oh my god, no f*** way!" to "That can't be real." Some suggested to open it. Others said no way.
The mystery eluded the dorm for an entire semester. Then finally she admitted that it was filled with some kind of thick palm oil. I don't know if there were any confirmations on the fallacy.