I don't think its so much about "obsession". It could also be about realizing a fantasy of something or someone who has always been just be a fantasy, the black hearted love that you are fatally attracted to.
"When you call out my name in rapture
I volunteer my soul for murder"
the inevitability of the harm. she is okay with knowing he makes her give up complete control (if even just for that brief moment). She knows she is helpless to all that he embodies (the "dark" one who will never be good for her, but she's come to terms with it). He'll actually lurk around in her mind from the past and she'll wonder, occasionally seeing him "in the shadows". He's the black hearted one, but her being able to "take you to a place" means she is aware of things he is not and has just as many secrets to show him, so perhaps they are on an equal level.
I don't think its so much about "obsession". It could also be about realizing a fantasy of something or someone who has always been just be a fantasy, the black hearted love that you are fatally attracted to.
"When you call out my name in rapture I volunteer my soul for murder"
the inevitability of the harm. she is okay with knowing he makes her give up complete control (if even just for that brief moment). She knows she is helpless to all that he embodies (the "dark" one who will never be good for her, but she's come to terms with it). He'll actually lurk around in her mind from the past and she'll wonder, occasionally seeing him "in the shadows". He's the black hearted one, but her being able to "take you to a place" means she is aware of things he is not and has just as many secrets to show him, so perhaps they are on an equal level.
but yes, fatal love.