It's good to tip people who give you good service
Hilary eats a nice dinner at a fancy restaurant and is ready for her waiter to bring out the check.
Hilary wants to pay for her meal.
Hilary pays for the meal and leaves a big tip for the waiter.
Hilary leaves just enough money to pay for the meal without tipping.
The waiter thanks Hilary for leaving such a generous tip.
The waiter calls Hilary a cheapskate after she leaves the restaurant.