This song is about a guy who is madly inlove with the girl. He wants her to himself forever so in order to do that and make her all his he kills her. He "wants" her in a sexual way however he doesn't want the body to be cold while hes having s** with her (while dead) so he has a heater to warm her up and make her seem alive. However after a while her soul comes back from the dead and rejoins her body to kill him for his "crime". When she kills him they get married in order for him to make up for what he has done. With you have my heart at least for the most part - they both love each other but not fully there is someone else out there and they both know it. Over all its a very morbid song but I love it. Its funny because my boyfriend and his friends will sing this in the car then out of no where I will join with the lady part. However I get into it due to the fact I have had theatrical training. Ok well yeah that's pretty much the song in a nut shell or at least what I have gathered from it.