My husband and I were eating dinner in Las Vegas. There was music in the background and the song came on. When it came to those lyrics, I asked my husband what he thought they were, and he told me the real words. I finally stopped laughing long enough to tell him what I thought they were for the last 30 years. Then he told me his favorite misheard lyric ("Rhythm Tootsia", or "Driven to Tears" by The Police). I just about fell on the floor laughing.
Let me close by saying that I feel validated that someone else heard "xylophone"!! See? I'm not the only one!