The reason is that you eat too many foods that are high in "calories," which are little units that measure how good a particular food tastes. Fudge, for example, has a great many calories, whereas celery, which is not really a food at all but a member of the plywood family, provided by Mother Nature so that mankind would have a way to get onion dip into his mouth at parties, has none.
Dave Barry, Dave Barry's Guide to Life
calories, food, taste