
I agree, if you're offended by the song choose a different song, or at least make a modification that RHYMES! Like when we sang "Jeremiah was a Bullfrog" in my elementary school, we sang about how we always had a mighty fine time instead of how he always had some mighty fine wine.
You reminded me of when I was 7 or 8 and at my best friend's house, and her dad got us to calm down by saying that if we did he would teach us a Dirty Song. Oh boy!! The song was:
Yankee Doodle went to town a-riding on a turtle.
Turned the corner just in time to see a lady's girdle.
He waited for our shocked giggles. We looked blankly at him and asked, "What's a girdle??"

(He was kind of an old dad...must have been our age circa 1940 when girdles were common!)