After marrying a much younger woman, a 93 year-old man visited his doctor and announced they were expecting a baby despite the doctor's previous reassurances that they would not need to use birth control.
"Let me tell you a story," said the doctor. An absent-minded fellow went hunting, but instead of a gun, he picked up an umbrella. Suddenly a tiger charged toward him. Pointing his umbrella at the tiger, he shot and killed the animal on the spot." "Impossible!" exclaimed the old man. "Somebody must have shot from the side!" "Exactly," replied the doctor.