It's true that a few foods, such as grapefruit and celery, contain fewer calories than it takes to digest them. So, when you eat these foods, you actually burn more calories than you take in. Thus, the term "negative-calorie foods."
Although you'll thank your new boyfriend profusely for the enormous box of chocolates he gave you (who can resist that?) I definitely have some strategies to make this special day healthy, too. I can't guarantee you a date on Feb. 14, but I can certainly help you stock up on foods of love.