I absolutely love this song. One thing about Fall Out Boy is that they don't want everything to be blatant and obvious. They want you to think. And sometimes you need to look at the lyrics from a different perspective to see what they're about. Mewlover13542 said what this song's about perfectly. "Does he know the way to worship our love?" means the love triangle, and that the husband may not be as in love with the woman as he previously was, or the woman is cheating and loves the other man more. 'i will never end up like him, behind my back I already am' might mean that he truly does love the woman, but what's life without a little expirimenting? A little change every now and then? Everyone has to have a little mysterious or rebellious side to them, right? And even if he gets the girl in the end, would that change anything? So, with Fall Out Boy, not everything is as it seems. It may not make sense until you look at it differently, hear it with a new set of ears, so to speak. All in all, Fall Out Boy is more than the tabloids perceive them to be, and that's what I love about them.