Who can tell me the meaning of this English joke?

First, Polat told a funny scene: a chair with shoes was laughing while walking.

Then the woman said it was a funny scene.

Polat then asked the woman if she could tell the joke, but the woman's answer was that she had better not, because the funny scene was just a stupid joke.

But, in fact, that man has already told that cold joke.

Translation:

There is a chair. It wears shoes and laughs while walking.

W: Well, this is an interesting scene.

Can I tell this joke?

W: Maybe it's better not to say.