People shouldn't buy more stuff than they can feasibly use.
Katherine is about to go on a weekend trip to the beach and is shopping at the mall.
Katherine wants to buy a bathing suit.
Katherine picks out one bathing suit that was her favorite and purchases it.
Katherine notices five bathing suits she really likes and decides to buy them all.
Katherine wears her bathing suit multiple times over the weekend and is thrilled with her purchase.
Katherine doesn't get to wear all her new bathing suits at the beach, and she also has significantly less money to enjoy her vacation.