Gary is about to go on his first date, and is nervous about what to talk about. He asks his father for advice. The father explains, "My son, there are three subjects that always work. These are food, family, and philosophy."
The boy picks up his date and they go off to a soda fountain. Ice cream sodas in front of them, they stare at each other for a long time, as the boy's nervousness builds. Suddenly, he remembers his father's advice, and chooses the first topic.
He asks the girl, "Do you like spinach?"
She says "No," and the silence returns.
After a few more uncomfortable moments, the boy thinks of his father's suggestion and turns to the second item on the list. He asks, "Do you have a brother?"
Again, the girl says "No," and there is silence once again.
The boy then plays his last card. He thinks of his father's advice and asks the girl, "If you had a brother, would he like spinach?"