A man goes in to his doctors surgery and asks, "Doctor, do you think I will live until I'm 100?"
The doctor asks, "Do you drink, smoke or do drugs?" The man replies, "No". The doctor then asks, "Do you like to sleep around with women, and go out partying?" The man replies, "No, I don't."
The doctor then asks, "Well, why the **** do you want to live until you're 100 then?"