Hmmmm...
As for the aches and pains of getting older, I'm not sure about that. I have heard someone in his 30's telling someone in his 20's "When you hit 30 everything starts falling apart." I've also heard that said to a 30 year old by a 40 year old, "When you reach 40..." and by a 50-something to a 40-something about getting to 50.
Balderdash.
Then there's my senior pastor who is 83 years of age. This week he went up to Missouri to pick up a load (yet another load) of watermelons. He sells them in front of the bank. Profits go to our Sheaves for Christ offering. Nobody ever asked him to, it's just something he's been doing for years now. I mentioned to his wife, "You know, I heard a rumor that your husband retired." She shook her head and said, "That's just a rumor." And I've never, ever, ever heard him say "When you reach -- everything starts falling apart."
As far as complaining about how your body is doing, I think that's just different people's complaining threshold. I've noticed some people complain when they have very little to complain about, where others only complain if the problem is very large. When I know something about a person I know how serious to take his complaining. Some of my close friends, if they complain about something I will take it serious. I'll wait until THEY start complaining about old age woes. Then I'll start to worry about hitting their age.