What happens when someone orders a second dessert when he or she is already full from the first dessert?

The second dessert has less utility than the first dessert.

Explanation:

After lunch or dinner, the desire to eat dessert grows because heavier foods are slow to be processed, and the body is still hungry. So the first dessert has the effect of quenching a person's hunger. So after eating dessert the body feels satisfied and not hungry. However, when this person asks for a second dessert, the body is already satiated, so the second dessert will not be as useful as the first.

i think it is dna, i'm not totally sure but i think it might be.