'I'm only gonna let you kill me once.'
Now, I'm not sure if you are aware of this, but it pretty much only takes once. Being murdered isn't really a more than one time deal, I'm afraid. It's kind of final like that. The person you are singing to won't need to kill you a second time because, well, kind of because that's sort of impossible, and if there was a chance that this person did kill you and you came back to life, you would at the very least... you know what, I've lost where I'm going with this. It's a stupid fucking lyric. That's all.