female antagonist when she claimed her body was a temple, in an episode of the TV sitcom, Just Shoot Me.....
"Ah! That explains the line of men trying to get into it on Friday night."

Because my body's doing all kinds of strange and unexpected things to me.

You're in the Overture of the "Pagent Of The Aging Continuum".
Wait 'til your "Dates" have turned into trips to the Doc and a little Lunch.
And, how sad is it that a piece of Cake is me bein' bad?
Enjoy your body while it still works.
Do what you still can with an attitude of Piss and Vinegar.
Embrace the Unexpected (when you can).

But I get your drift.

out, and has the body of a 20 year old. Still has a face like Ernest Borgnine."

I keep asking myself, 'how the hell did that happen?'

Your hair is iffy, you cry easily, certain activities are not possible, like skiing and the faintly remembered joy of cartwheels.
It's like everything is reversing itself and what you grew into you're now growing out of.
Still, there are the years of acquired wisdom and on occasion, the long view and a philosophical outlook.
Oh to fly down a ski slope or fly again to France.
Well, there's still the wonderful oceans and lakes and if you swim, that is a true delight.