Jerry, makes perfect sense to me.

I know we joke about our ages here but I a now 62, and I look at myself and just cannot believe I am that old, I keep asking myself where has my life gone?

I do have a lot more aches / pains that I used to but I just grin and bear it, like you I am sure that I am still 17

Once I stick my leg over any of my bikes any pains I have dissapear - ride on man, ride on......