There it is:

That hunger feeling. The one where I'm hungry to the point where my Stomach folds over, trying to delude himself that he's actually full. Hunger to the point of nauseousness, like the way you can be cold to the point of hot. I think, in that case, it's the body's way of defending against extreme temperature. Your cells are saying, "I can't take this. Maybe if we tell the Brain that we're really warm, then he'll fall for it and we'll BECOME warm!" It's called the placebo effect. The mind had that kind of power.

But it's a little worse for hunger---After some complaining, the Stomach takes note of the fact that he's still yet to be fed and so he convinces himself that he doesn't want food anyway. The Stomach is a petulant child.