"Aging" joke

Just a note to say I'm living,
That I'm not among the dead,
Though I'm getting more forgetful
And mixed up in the head.
I got used to my arthritis,
To my dentures I'm resigned.
I can manage my bifocals
But gosh, I miss my mind!
For sometimes I can't remember,
When I stand at the foot of the stairs,
If I must go up for something
Or have just come down from there?
And before the fridge so often,
My poor mind's filled with doubt.
Have I just put food away
Or have I come to take some out?
So if it's my turn to write you
There's no need for getting sore;
I may think that I have written
And don't want to be a bore.
Just remember that I love you
And wish that you were near.
Now it's nearly mail time
So I must say good bye, my dear.
Here I stand beside the mailbox
With a face so very red!
Instead of mailing you my letter,
I have opened it instead!
... Author unknown