(no subject)

I've noticed a strange but consistent pattern: When I go to bed full, I wake up hungry; when I go to bed not full, I wake up not hungry. This holds for pretty much any amount of sleep that is both overnight and might count as a full night (let's say min. 6 hours), and does not vary above that; it does not hold for naps during the daytime (indeed, if I take a nap while full, on waking I am usually queasy, groggy, and uninterested in food for the remainder of the day). Hypotheses, anyone?