Is there something about this song that I'm missing?

I bought the song 9 Crimes by Damien Rice. It's a cool song and I know it has something to do with cheating...but the album cover has a parental advisory sticker. I don't see that there is anything excplicity wrong with the song, though. Either there are other songs on the album that are explicit and not this one, or the song has some sort of subliminal messaging. Does anyone know?