It is ungrateful to waste a gift.
Ian gets a nice pair of headphones from a fellow friend who doesn't need them any more.
Ian wants to use the headphones.
Ian puts the headphones in a protective case and uses them while sitting.
Ian puts the headphones in his backpack and uses them everywhere, quickly breaking them.
Ian's friend is impressed with how Ian cares for things and gives him more expensive gifts.
Ian's friend complains that the headphones cost a lot of money and that he's a fool for breaking them.