A ninety-year-old man went to the doctor and said, "Doctor, my eighteen-year-old wife is expecting a baby."
The doctor said, "Let me tell you a story. A man went hunting, but instead of a rifle, he picked up an umbrella by mistake. When a bear suddenly appeared and charged at the man - he picked up the umbrella, shot the bear, and killed it."
The man said, "Impossible. Someone else must have shot that bear."
The doctor said, "My point exactly!"