The etymology of the word "cornhole" baffles me. I've heard of "piehole" used to mean "mouth," but that always seemed to be because one normally puts pies in one's mouth.
One does not, however, normally put corn in one's ass. (Broccoli, maybe, or Brittney Spears dolls, but not corn.) I can't help but wonder who the first was to determine that "cornhole" (a combination of two nouns which were also inexplicably "verbed") would be a synonym for "manrape," another word easier to trace etemologically.
Just pontificating.