CURIOSITY OF HISTORY. In ancient England, people could not have sex without the King’s consent (unless it was a member of the royal family). When people wanted to have a child, they had to ask for permission from the monarch, who handed them a plaque to hang outside their door while having sex. The sign read: "Fornication Under Consent of the King" (F.U.C.K.). That's the origin of such saved words. CTTO 😊