>>809397There is a single succubus/monster thing that can only slowly walk at you, but is pretty much unstoppable. It all starts by you having sex with the person it was previously following.
It then follows you until it either kills you (by raping you to death) or you have sex with someone new and it goes after them instead. But if that person dies, then it comes back to you, and so on down-the-line. No one else can see it except those it has followed in the past, but it is real and physical; it needs to break a window to get into a house.
The director said he wasn't really trying to say anything about STDs or AIDs in the movie, but he said he knew people would inevitably interpret it that way.
