Things licked off knives and spoons have no calories if you are in the process of preparing something. Examples are peanut butter on a knife making a sandwich and ice cream on a spoon making a sundae. Foods that have the same color have the same number of calories. Chocolate is a universal color and may be substituted for any other food color. Foods that are frozen have no calories because calories are units of heat.
Examples are ice cream, frozen pies, and popsicles.
If you eat it off someone else's plate it has no calories, it was their food, not yours. Also, if you eat standing up, the calories don't count, you are using them to stay upright.