Great! I like knowing that sort of thing. Like, on my "Caramel_Knowledge" 'toon?? "For Unlawful Carnal Knowledge" is NOT the origin of the "F" word. That's a pure myth.  It seems that it isn't certain what IS the origin, though, because it was considered so dirty nobody would write it down. I saw some suggestion that is was derived from old Dutch, or Windish, or some such.