To me, it's a song about fatal attraction. In the beginning of the song he's in a graveyard lying next to a mausoleum, where she is buried. He asks her "Am I more than you bargained for yet? She only wanted a lover but he was mentally unstable and you can see it in the line "Cause that's just who I am this week". He goes on to say how she saw him "a notch in your bedpost" but tells her what he made her into, nothing more than "a line in a song". While they were fooling around, him being the latest in a line of lovers, he asked her to divorce her husband. Divorcing her husband would break the husbands heart "drop a heart" and her last name would be changed back to the maiden name "break a name". "We're always sleeping in, and sleeping for the wrong team." is his reflection that what they were doing was wrong in the first place because marriage is supposed to be sacred, thus they were "sleeping for the wrong team" They would sleep in late in the husbands bed, thus "we're always sleeping in" "Is this more than you bargained for yet" and "Oh don't mind me I'm watching you two from the closet" is where they were almost caught and he's hiding in the closet. Wishing to be the friction in your jeans" is just him wishing to be close to her. What's closer than the jeans a woman wears? The friction between her and the jeans she wears, of course. (Unless you count underwear and even then, the friction between the underwear and skin is still closer). "Isn't it messed up how I'm just dying to be him" is him realizing how wrong it is what they are both doing and how it's messed up that he feels this way for a married woman. "We're going down, down in an earlier round and Sugar, we're going down swinging" Speaks of the argument that they finally have when he wants to become her only one. They fight about it and get physical and end up on the floor, wrestling with a gun. "I'll be your number one with a bullet" is about him telling her about his plan to kill the husband with a gun so he can become her only one. When you love someone, they mean more than anything in your life, essentially number 1 in your life. The lover will become number one in her life with a bullet by killing the husband. Then the argument starts because she doesn't want it that way. "A loaded God complex, cock it and pull it" is him being ready like a loaded gun but it's his "God complex" that will go off. "cock it and pull it" is him daring her to try him. In a repeat of the chorus you hear "take aim at myself, take back what you said, take aim at myself" and the meaning behind this is him wavering between killing himself and shouting at her to take back what she said.