On becoming a very elder statesman

Senator McCain is healthy at 72
So, about his age, what's all the to-do?
I'm older than John, I'm 74
If he's like me, he'll have this in store.

As I walk in pain I tend to slip
My doctor tells me I need a new hip
I have a condition of men, you know, which is
My prostate is much too big for my britches

I feel that aging is my real opponent
When I too often have a senior moment.
My body processes now crick and crack
With my bladder now the leader of the pack

McCain will be an octogenarian (octo = eight)
It might distract him from the affairs of state
The ravages of age I do decry
And I hope McCain has better luck than I.