When you eat with someone else, calories don't count if you don't eat more than they do. If you fatten up everyone else around you, then you look thinner. Cookie pieces contain no calories. The process of breaking causes calorie leakage. Things licked off knives and spoons have no calories if you are in the process of preparing something.
Examples are peanut butter on a knive making a sandwich and ice cream on a spoon making a sundae.
Foods that have the same color have the same number of calories. Examples are spinach and pistachio ice cream, mushrooms and white chocolate. Chocolate is a universal color and may be substituted for any other food color.