bite is much less than the amount you got after that first, blissful bite into a powdered-sugar doughnut. The pre-bite dopamine blast you’re now getting is the promise of more bliss, and the post-bite drop in dopamine is, in a way, the breaking of the promise—or, at least, it’s a kind of biochemical acknowledgment that there was some overpromising. To the extent that you bought the promise—anticipated greater
