I heard these from my father, who heard them from a friend, etc.
Theyre definitely not original.

A young man is jogging through a park when he sees an old man sitting
on a bench sobbing. Concerned, he stops by the bench. Is there anything I can
do for you, sir?

Oh, sobs the old man, everythings wonderful. I just married a
gorgeous twenty-year old wholl do anything for me, and even my children love
her. We have a beautiful house, a pool…

So whats the matter? the puzzled young man asks.

I cant remember where I live!

Three old ladies are sitting in a diner, chatting about various things.
One lady says, You know, Im getting really forgetful. This morning, I was
standing at the top of the stairs, and I couldnt remember whether I had just
come up or was about to go down.

The second lady says, You think thats bad? The other day, I was
sitting on the edge of my bed, and I couldnt remember whether I was going to
bed or had just woken up!

The third lady smiles smugly. Well, my memorys just as good as its
always been, knock wood. She raps the table. With a startled look on her face,
she asks, Whos there?