If a calorie falls into your mouth, does it make a difference? A bite of a mini candy bar here, and a taste there of a sample at the grocery store may not seem like much when you are eating, but do it enough and it adds up. You want to be careful not to taste test your way to weight gain, and consuming enough "empty" calories can contribute to that. Contrary to the term, an empty calorie does not refer to a food that is low in calories, but a caloric food with very little nutritional value. For example, a breakfast fruit bar and a candy bar may have the same number of calories…