FAMILY PLANNING CLINIC

    A bloke and his wife went to a family planning clinic.

    "We've been married for ten years and we've got no kids," said the husband. "And the next-door neighbors say it's because we're stupid."

    "Nonsense," smiled the doctor. "It's probably to do with your diet. Or it might be a question of timing. How many times a week do you do it?"

    "Do what?" asked the wife.