You’ve probably heard of the infamous “marshmallow test,” in which young children are asked to wait to eat a yummy marshmallow placed in front of them while left alone in a room for 10 to 15 minutes.
Imagine there is a marshmallow sitting on a plate in front of you. A nice lady in a lab coat sits next to you. She tells you she's going to leave the room, and you can eat the marshmallow if you want.