We use it on a daily basis, but where does it come from?
Obviously it is understood that the definitive meaning is fornication,
But how did it reach this,
Well in days of Yore, Judges would refer to prostitutes as people who would Fornicate Under Consensual Knowledge.
So in a court case, the Judge would shorten this "Bailiff bring in the F.U.C.K-ers"
From there on the act of physical love has been referred to as Fucking,
THE MORE YOU KNOW =☆