This is just beautiful! Steve writing about his relatively new wife Kim Poor but, alas, like so many similar stories, love didn't last - it's not a particularly pleasant story, so Google it if you're interested.
And he couldn't have chosen a better singer than Randy Crawford to sing his brilliant song.
There have been many songs written about the dangers of promiscuity but, to the best of my knowledge, this is the only specifically about crabs aka pubic lice. Unless, as Esther Rantzen used to say, you know different.