This song is about a complicated & likely codependent relationship in which the person narrating is deeply entangled. It's not a healthy or particularly good coupling, as he doesn't even try to hide all the drama & pain: (every me & every you is a poetic way of saying they've shown every side of themselves to one another in the course of the relationship, even some they themselves weren't necessarily aware of. They have mad sparks but bring out the worst in each other & push one another to ever darker and unexpected places.{carve your name into my arm,instead of stressed I lie here charmed/I serve my head up on a plate, it's only comfort calling late}
sucker love, obviously stating from the start that both of them are "suckers" for this relationship and one another, based on chemistry alone. But he's aware that it's doomed & he just wants to stretch the good parts as long as possible. (Pucker up, for Heaven's sake-there's never been so much at stake! & in the shape of things to come, too much poison, come undone) A song celebrating the thrill & rush of a toxic pairing based on sex and drama.