A man was about to go on his first date, so he asked his friend for advice and tips.
"Here's the secret," said his friend, "girls like to talk about three things: food, family, and philosophy. If you talk about food and family, it shows your intentions are honorable. If you discuss philosophy, it shows your respect to her intelligence."
That night he met his date, an attractive woman. They had dinner at a fine restaurant.
"Do you like McDonald's?" he asked.
"Not really," replied the puzzled woman.
"Do you have a sister?"
"Well, if you had a sister, would she like McDonald's?"