A very refined young man comes to a small food shop and sees fruit. "Give me two kilograms of oranges and wrap every orange up in a separate piece of paper, please," he says to the saleswoman. She does it.

"And three kilograms of cherries, please, and wrap up every berry in a separate piece of paper, too." She does.

"And what is it there," he asks pointing out at something dark in the corner.

"Raisins," says the saleswoman, "but they're not for sale."