"I've never been better!" he replies. "I've got an eighteen year old bride, who's pregnant with my child! What do you think about that?" The doctor considers this for a moment, then says...
"Let me tell you a story. I know a guy who's an avid hunter. He never misses a season. But one day he was in a bit of a hurry, and he accidentally grabbed his umbrella instead of his gun. So, he's walking in the woods near a creek, and suddenly spots a deer in the brush in front of him... He raises up his umbrella... Points it at the deer... And squeezes the handle... --- BAM!!! The deer dropped dead in front of him."
"That's impossible...!" said the old man in disbelief... Someone else must have shot that deer...!"
"Exactly......."