Do you have that much restraint when it comes to eating food that you KNOW isn't good for you? So it's safe to assume then that you stay completely away from simple carbohydrates because they cause your blood sugar to spike and your pancreas and liver have to work overtime to get those levels back down again?
Come on! You don't even have that restraint so do you really expect a 5 year old, whose brain still has immature self control, to be able to just say no to chocolate of all things?
The mind boggles ..