I fancy myself as moral but I find that this song manages to be salacious while preaching morality. Not an easy trick. Jonathan King wrote and produced it. I am not going to be cheap and make a comment about that, given the song's title. Nice big chorus, always a plus in any song, I think. I like the cello and slightly hesitant vocal in the verse too. It even pulls off the one trick normally guaranteed to make me never want to hear a song again, namely a key change in a reprise of a chorus. The singers of this later sang backing vocals on Bryan Ferry's version of "A Hard Rain's a-Gonna Fall", amongst other things.
Remember, girls "if he has you, he will leave you. Don't let him touch you".