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’
‘Do you spend a lot of time in the sun, like playing golf, boating, fishing or relaxing on the beach?’
‘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 care?’