One reason that the word fuck is so hard to trace etymologically is that it was used far more extensively in common speech than in easily traceable written forms. There are several urban-legend false etymologies postulating an acronymic origin for the word. None of these acronyms were ever heard before the 1960s, according to the authoritative lexicographical work The F-Word, and thus are backronyms. In any event, the word fuck has been in use far too long for some of these supposed origins to be possible. Some of these urban legends are that the word fuck came from Irish law. If a couple were caught committing adultery, they would be punished "For Unlawful Carnal Knowledge In the Nude", with "FUCKIN" written on the stocks above them to denote the crime. Another theory is that of a royal permission. During the Black Death in the Middle Ages, towns were trying to control populations and their interactions. Since uncontaminated resources were scarce, many towns required permission to have children. Hence, the legend goes, that couples that were having children were required to first obtain royal permission (usually from a local magistrate or lord) and then place a sign somewhere visible from the road in their home that said "Fornicating Under Consent of King", which was later shortened to "FUCK". This story is hard to document but has persisted in oral and literary traditions for many years; however, it has been demonstrated to be an urban legend.
it's easyer to ask for forgiveness than permission
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