Joke stolen from: Joann

Debbie was a knockout but alas, she also was virtually brainless. Fortunately, this was no drawback as far as Tom's plans for the evening were concerned. He was delighted when she agreed to come up to his apartment for a nightcap. As he prepared the drinks, full of anticipation, Debbie explored the apartment, stopping now and then to examine a painting or a book title, she didn't quite understand. At last she stopped dead in front of his fireplace. "What on earth is that?" she asked pointing to a carved wooden object lying on the mantel. "Oh, that. It's African," he replied. "They use them in their fertility rites. It's a phallic symbol." "Oh, I see." stated Debbie demurely. "I'd hate to tell you what it looks like!"