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, and 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?”