"Well," the doctor says "you have to quit smoking."
"No problem, I don't smoke" the guys says.
"And no drugs."
"OK, no problem, what else?" the guys says
"You have to exercise five times a week."
The guy pauses for a moment and says, "Anything else?"
"No processed foods or fast food. And no alcohol. Stay out of the sun and always get a good night's sleep."
Looking irritated the guy says, "And if I do all that I'll definitely live to be 100?"
"Well, no" says the doc, "But it'll feel like it."