I've been reading The Rise And Fall Of The Knights Templar and I stumbled across the following passage about the Gnostic Cathar heresy which Rome stamped out in the Middle Ages:
"They [the Cathars] held that their spirituality and their attained gnosis meant that they would be released from the mortal coil, and death would liberate their soulds to return to Heaven. Catholic propagandists wrote that some Cathar followers preferred, on account of their beliefs, to copulate in fashions that would not produce more children for the Devil. It therefore became common for the Inquisition to accuse suspected heretics of buggery (a word descended from Bulgar, or Bogomil)."
Well, next time you say "Bugger!" you'll know what you're actually saying...