I ate a whole 9 inch pizza last night and it felt like it was entering a bottomless pit and didn't satisfy my hunger at all. Usually I'd be full.
It could be because when you overindulge your stomach expands so the amount of food you ate before wont fill you up anymore until it shrinks back down (it may be a couple of days). Your stomach shrinks if you starve yourself or eat very little.
For once I know something useful
Although I have no idea who told me that ??