Have you ever taken
one of those
biological age tests that are all the rage on the internet? (Warning: most are designed to pitch you
something at the end.)
There is probably some marginal utility to such things. Obviously you have an actual age, and that age
cannot change; the year you were born is the year you were born. But the
medical reality at the root of these tests is that the number and intensity of
stressors in your daily life tend to shorten it, while the absence of such
stressors will, at very least, not make things any worse. Thus your “biological age”, as these folks define it, is something akin to your own personal doomsday clock.
Do you smoke? Lose five years. More than two drinks a day? Ooh, you’re in trouble. Hate your job
or sleep too little? Another strike or two. Depending on your situation and
habits, you may start to wonder why you haven’t keeled over already.