Humor that doesn’t contribute to the conversation is generally discouraged.

I'm not sure I understand this. Humor generally doesn't "contribute to a discussion"—it's purely that, humorous. I'm not sure how OP's comment contributes any less than any other joke one could have made.

Really clever humor can entertain and educate, although admittedly it’s rare.

The most common sentiment I see when people attempt cheap jokes is that Reddit is a more appropriate forum.