GourmetPrince wrote...
It keeps the roof of the mouth at an angle.
I can't think of any other reason. Also, it sounds very strange. Not something I would enjoy.
Since I wasn't really getting the answer I was looking for I gave wiki a shot and apparently its just to keep the head at a certain angle. There are also "Ass Hooks" and "Pussy Hooks" along with Mouth Hooks.
Apparently, I was right and its suppose to keep their head back and make them look like a pig. Man, sometimes you just look too deep into something.