> Four hours after eating maximally, the participants [...] reported no desire to eat anything else, including sweet foods. This was surprising because reward c

> Four hours after eating maximally, the participants [...] reported no desire to eat anything else, including sweet foods. This was surprising because reward centres in the brain are usually food specific, so eating pizza might not be expected to change the desire for sweet food. No it's not surprising because - whether it's contrary or not the neurodrivel "reward centres in the brain" i'm not sure - as an adult you know that craving for a specific food item is entirely a high-level construction in your psychology to do with the story you're telling yourself about what it will mean to eat that, etc. and you should have experienced that it will go away as soon as you eat enough of anything else.