Will word for food

I have been racking my brains for days trying to remember this joke. I heard it once and, since then, have been unable to re-tell it quite right. Can you help? And yes, it is a writing thing – I’m trying to find the ideal wording, not the punchline.

Is it a good idea to try to put a little bit of humour in your writing? Humour makes you human, but does it risk making you look foolish? Should you try to look clever? It’s a minefield, and one I’d like my readers to explore, if possible. Let me know your thoughts!