It's interesting. It could be related to the fact that if you didn't have enough sleep you feel tired and this "bad" so your natural inclination is to think may

It's interesting. It could be related to the fact that if you didn't have enough sleep you feel tired and this "bad" so your natural inclination is to think maybe if I ate something good I would feel better. The best thing to do would be to follow the natural instinct and juts get some sleep but often that is not possible, in the office for instance.