Lyric discussion by RevolutionNein 

Cover art for Rhythm Section Want Ad lyrics by They Might Be Giants

I thought the line "do you sing like Olive Oyl on purpose" was "do you sing like Animal on purpose" (Animal being a character from The Muppets). The reason this made sense to me was because, the voice (apparently) saying "No" over and over after that line sounded similar to how that character talks. Singing like Olive Oyl works just as well, though.