Well... I didn't get many replies to my question. Could be because you cannot possibly imagine... being 81 years old ? I understand, and I will clarify:
Being 81 is not so much different than being 35. Same body, which demands the same attention... but a little more. If we are smart, we start rejecting all excessive behavior, like getting high with alcohol, partying late throughout the night, pigging out with delicious junk food, and... trying to still get some action in the gay saunas. In fact, the urges of sex gradually diminish and this is a blessing because we can forget about sex and still be happy. At 81 one is retired, with plenty of disposable time. And what better to do with this time than going after HEALTH. Healthy nutrition, healthy exercise. Preserving a well functioning body is a source of satisfaction, and PRIDE.