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 at something dark in the corner.
"Raisins," says the saleswoman, "but they're not for sale."