You should not depend on others to pay for you.
Bob is out at a restaurant with friends, but only has enough money for a small meal.
Bob is hungry and wants to eat a big meal.
Bob orders himself a small meal, and asks his friends if they would pay for an appetizer to split with him because he doesn't have a lot of money.
Bob orders a large meal and, once the bill arrives, tells his friends that he just discovered that he forgot his wallet, expecting them to pay for his meal.
His friends order him an appetizer, and even buy him a desert as well to try to make him feel better about being broke.
His friends refuse to pay for his meal, and Bob is forced to clean dishes in order to work off his debt.