That’s “clever” and witty but it didn’t make me laugh. Just smirk. Not a joke. This IS a joke:   My wife rang me just now and said I think there’s water in the carburettor. I said where’s the car? She said in the river...

The best way to answer the question “What is a joke?” Is to spend less time getting all psycho-cultural about it (enough of that is as good as a feast) and more time peppering the thread with examples. You haven’t done that yet, and how many posts are we up to?