I’ve always had a fascination with the fictional rules of possession: what laws govern this? What are the loopholes? Why is there so much vomit? There is usually (if a victim) no consent for the entity to possess a host, which is part of the horror. More broadly, I’m fascinated by the rules that constrain the monsters or people in horror. So like, choosing to watch a video you have been warned is haunted suggests consent. Forcing someone to watch that same video so they will be cursed entails no consent, and is violence.