laughter keeps you young

Have you ever tried to tell a funny story that happened with your friends to someone else?
And then after you relate it, you hear it again, and they don't laugh...
Then you have to think
a) maybe I told it wrong
b) maybe it wasn't funny afterall
c) maybe you just had to be there.
But it had to be funny, because your best friend did that laugh she does when something's really funny, and you didn't tell it wrong because you remember all the details. You must have just had to be there.

I wonder if when we're really old, will we still be telling the same stories and laughing about them?
Will we remember all the details? Or will it just be one of those
"Hey, you remember that one art teacher?"
"haha yeah. Remember that thing with his dog?"
And then you all laugh, when in reality, nobody remembers the art teacher's name, or the thing with the dog, we'll just remember that at one point in time, the subject made your friend do that funny laugh, even if she doesn't do it quite the same in her old age.
But we'll all remember that we laughed. So it must have been funny.

Maybe when we're old, the exact memory won't matter, because we can't remember it anyhow.
It won't be the memory of the event, but the memory that we laughed.

But, In the end, I guess, that's the most important memory, isn't it?