Ever seen an animal feasting? It will consume food till its belly is full and then walk away leaving the rest to the other animals.(It could go differently if they either buy a refrigerator or understand the concept of frozen food).
Ever seen a human feasting? It will consume food till its belly reach the rupture point and then walk away with packed leftovers.(It could go differently if either humans try to value the concept of moderation or share with those suffering from malnutrition and starvation).