Cognitive decline jokes

Q. What do a one-story house and an Alzheimer's victim have in common? A. Nothing going on upstairs.

My doctor told me I had Alzheimer’s.

I said to him, “I don’t remember asking.”

Political correctness has gone too far! You have to say "cognitive decline" rather than "Alzheimer's ridden shitbag"!

How can you tell Donald Trump is old and demented?

He can't distinguish between tanned people and cockroaches!

I would've made a joke about Alzheimer's, too bad I forgot about it...

I want to make a joke about old age, but I'm too senile to finish it.