The song, released about a year after the duo reportedly ended their affair, features a spoken word section where O'Day plays out what she says is a real argument she had with her ex-lover.
She told a fan that the letters in the title of the song stand for "the man I wrote the album about."
In the spoken word section, the man says he thought they were forever but "maybe I was lying to myself."
I don't know, I could... I couldn't do what I said I would do
So that answered the question for me
I'll always want you and always wonder about it
But it doesn't matter because I have to stay here...
You know, I think probably the loss of the other world
I'm torn between two worlds both of which I wanted.