It's selfish to not share with others your living with.
Coy has just gone to the grocery store and is putting his groceries away in the cabinet.
Coy wants to eat some of the chips that he bought.
Coy eats some of his chips and offers to share some with his father.
Coy eats some of his chips and refuses to share any with his father.
Coy's father takes a few of his chips and offers Coy some of the snacks that he has.
At dinner time, Coy's father tells him to fend for himself and find his own food.