I've always wondered that, too. (I do love the fats who claim they "really don't eat that much/barely eat anything" but are still going for the weight-loss surgery. It's so much fun to point out to them that if their fat truly comes from "genetics" instead of overeating, the surgery won't really do anything to help them, and then watch them sputter and throw childish fits. Hahahaha! Asshole, you know damn well if you're planning to have bariatric surgery that your fat comes from stuffing your face like a hog. Don't pretend it's something else, because we all know the truth.)