But then I become fixated on a certain food and then I eat it and eat it and eat it for days on end, sometimes weeks, until I am sick of it. It is a compulsion, I suppose. When I am eating a meal, I have no sense of portion control. I am a completist. If the food is on my plate, I must finish it. If there is food left on the stove, I must finish it. Rarely do I have leftovers.