I also saw a man with a pref bowel who was trying to show his wife that anal sex would not hurt. He put a toilet plunger on the floor in the bathroom, lubed himself up and squatted on the wooden end of the plunger. You guessed it, the plunger slipped, and rammed it's way up the colon till it found a bend, and voila, emergency surgery! Guess his wife was not convinced!