While some people self-insert as the killer, others imagine themselves on the receiving end or like being either. I've always wondered why I prefer to be the victim so here are some unscientific guesses.

1) As the victim you receive pity and attention. In fiction, people even pity antagonists who die horribly.
2) It's an incredibly submissive act to surrender your life to someone else.
3) An even darker rape fantasy. The extreme taboo nature makes it an appealing forbidden fruit fantasy.

I also enjoy the human cattle fetish. Breeding, milking and slaughter for meat gives meaning to my life. I'm not required to think anymore but I can live a very productive life as a female, fulfilling my duty by birthing the next generation in addition to providing food for society.