Living to Be 80

I recently picked a new primary care doctor.
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 beer
or wine?''Oh no,' I replied. 'I'm not
doing drugs, either!'Then he asked, 'Do you eat
rib-eye steaks and barbecued ribs?'I said, 'No, my
former doctor said that all red meat is very
unhealthy!''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.
He looked at me and said....

'Then why do you even care?