68 but that's what i get for being 5'9" and 240lbs and no exercise.
But as Rodney Dangerfield said, "Thanks to dieting and exercise millions of people are dieing healthy."
Also for you math buffs... (68 years)/(infinite years) = 0 years
so (72 years) = (68 years) = (1,000,000 years) because time is relative
so live your 0 years to your fullest
if eating things you like and not exercising for 68 years is more fun than exercising and dieting for 80 years; than do it