I was drinking every day when I got home from work [where I designed tests for Boeing].
At age 30 I did a test where I drank 0, 1, 2, 3, or 4 drinks a day for a week.
I wrote down how I felt every 1/2 hour.
Because people who have one drink a day have the longest life expectancy, I expected I would feel best with one drink per day.
I was wrong.
I felt best with 0 drinks.
A couple of drinks a day ... confounded by many, many other factors in an individual's life.