I recently picked a new primary care physician. After two visits and exhaustive lab test, he said I was doing "fairly well" for my age.
A little concerned about that comment, I couldn't resist asking him, "Do you think I'll live to be 80?"
He asked, "well, do you smoke tobacco or drink beer or wine?"
"Oh no", I replied. "I've never done either."
Then he asked, "Do you eat rib-eye steaks and barbecued ribs?"
I said, "No, I heard that all red meat is very unhealthy."
"Do you spend a lot of time in the sun, like playing golf / sailing /ballooning / motorcycling / rock climbing?"
"No I don't", I said.
He said, "Do you gamble, drive fast cars, or sexually fool around?"
"No", I said. "I have never done any of those things."
He looked at me and said, "Then why do you give a shit if you live to be 80?"