Live To Be 80

I recently picked 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, "Well, do you smoke tobacco or drink beer/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've heard that all red meat is very unhealthy!" "Do you spend a lot of time in the sun, like playing golf, sailing, ballooning, or rock climbing ?" "No, I don't," I said. He said, "Do you gamble, drive fast cars, or sexually fool around?" "No," I said. "I've never done any of those things." He looked at me and said, "Then why do you give a damn if you live to be 80 or not?"