The humor here is most concentrated in the title, more than in the lyrics. That's because the nearest the title comes to appearing in the lyrics is with a comma and a second occurrence of the article "a" inserted into what is otherwise the title line. So in the lyrics that technically clears up the ambiguity of the (presumably unintentional) double entendre in the title. As for that double entendre in the title, The best way I can elucidate its humor is to say -- Better a kind pair of fools than an unkind pair of fools! Enough said about the humor! I learned of this song's existence recently when I was at an establishment that had an apparent radio broadcast playing on little modules throughout the place. I call it an "apparent radio broadcast", citing the old adage if "If it looks like a duck and acts like a duck, --". In these new fangled days of everything from podcasts to EarPods or whatever else folks listen to music on, I could seem old-fashioned for assuming anything that looks like a radio broadcast and sounds like a radio broadcast IS a radio broadcast. Anyhow, the modules I was hearing the music on, when they are working optimally, display the title of the song playing. So I was struck right away with the ludicrous ambiguity in the title. By the time I heard the lyrics, I was still laughing about the double entendre, despite its being resolved in the lyrics by a comma and an article. But the comma can be overlooked since one doesn't hear punctuation in lyrics. So as far as I'm concerned, I can still say "Funny Lyrics" because I was still laughing, despite the ambiguity in its unresolved form being concentrated in the title.