I tried to write a love poem.

This joke is a masterclass in wordplay, hinging on the double meaning of the word "commit." The setup leads us to believe we're talking about a creative struggle—the act of finalizing a piece of writing and declaring it finished. The punchline, however, pulls a classic bait (Review)-and-switch, revealing the problem isn't artistic, but romantic. The poet can't "commit" the words to the page because they can't commit to a person in real life.

The humor is rooted in a very relatable modern dating trope: commitment-phobia. It’s the fear of settling down that fuels countless romantic comedies and awkward relationship talks. By framing this common relationship anxiety within the context of writing a poem, the joke creates a funny and clever metaphor. The unfinished poem perfectly represents an unfinished or undefined relationship, making the speaker's romantic shortcomings both poetic and hilarious.