Just wondering, how do you tell someone about a habit that is driving you up the wall? In this case, eating with mouth wide open, incredibly loudly, getting food everywhere and talking with mouth full... I have little patience with this, and when I was five I refused to invite someone to my party because they ate with their mouth open. I would have expected by the time someone reaches adulthood, they would understand basic eating etiquette. Thing is, this person is horrified by finger food and will eat everything (including some sandwiches) with a knife and fork. Anyone any suggestions? Just I'm going absolutely insane with it and am almost at a point where I don't want to eat around this person any more...