Binge eating, or emotional eating, can also be very subtle. It can be manifested in eating beyond the point you are full because the food it there, snacking often, etc. It can also be on healthy food. As long as we are eating without regard to true physical hunger, we are feeding emotions: boredom, disappointment, pressure, happiness, whatever...it is so common, I think we may just pick it up from home as we grow up.