I used to do this!
but solved the problem
A few years ago I got bifocals, well I cant find my mouth with them on!! LOL I have to take off my glasses to eat!
a friend of mine has the same problem and his wife is always yelling at him to not forget his glasses when we leave a restaurant.
the first time I tried to stick a pin in my mouth (after the bifocals) I stuck my lip and bleed like a stuck pig!!
never again!