The secret to a long life

A doctor was on his morning walk when he noticed an old lady sitting on her front step smoking a cigar. He walked up to her and said, "I couldn't help but notice how happy you look! What is your secret?"  

"I smoke ten cigars a day," she said. "Before I go to bed, I smoke a nice big joint.  Apart from that, I drink a whole bottle of Jack Daniels every week, and eat only junk food.  On weekends, I pop pills, get a little lovin', and don't exercise at all." 

"That is absolutely amazing!  How old are you?"

"Thirty-four," she replied.

Thanks to Gerallt for this one.