Oh well here's my contribution, which while a bit racy, I found one of the most interesting tidbits of useless information I've ever heard.
The origin of our favourite word comes from merry old medieval england where at times breeding programs were enforced which only permitted human propagation by consent of the king. Those permitted to breed were given a plaque to hang over their door which read "Fornication Under Consent of the King" or when shortened to an acronym..........well I'll let you figure that one out.