Will I live to be 80?

I recently chose a new primary care physician. After two visits and exhaustive lab tests, 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, "Do you smoke tobacco or drink alcoholic beverages?" "No," I replied. "I don't do drugs, either."

Then he asked, "Do you eat rib-eye steaks and barbecued ribs?" I said, "No, my other doctor said that all red meat is unhealthy!"

He asked, "Do you spend a lot of time in the sun, like playing golf, sailing, hiking, or bicycling?" "No, I don't," I said.

He asked, "Do you gamble, drive fast cars, or have a lot of sex?" "No," I said. "I don't do any of those things." !

Then he looked at me and asked, "Then why do you give a shit?"