A man asked his doctor if he thought he'd live to be a hundred.

The doctor asked the man, "Do you smoke or drink?"

"No," he replied. "I've never done either."

"Do you gamble, drive fast cars, or fool around with women?" inquired the doctor.

"No, I've never done any of those things either."

"Well, then," said the doctor, "what do you want to live to be a hundred for?"