it seems to me that the song is about mind games in a relationship and pushing someone's buttons. "shoot everything you came to shoot, do everything you came to do" is a taunt. "you wanna pop pop pop", etc. refers to the other person reaching a boiling point. "i'll put assassins in your little head" suggests that the person knows just how to get the other pissed off and pushes their buttons. "sleeping with the enemy" refers to the coexistence of a bad relationship (through head games) along with the romantic relationship. great song, and the lyrics flow really well.
it seems to me that the song is about mind games in a relationship and pushing someone's buttons. "shoot everything you came to shoot, do everything you came to do" is a taunt. "you wanna pop pop pop", etc. refers to the other person reaching a boiling point. "i'll put assassins in your little head" suggests that the person knows just how to get the other pissed off and pushes their buttons. "sleeping with the enemy" refers to the coexistence of a bad relationship (through head games) along with the romantic relationship. great song, and the lyrics flow really well.