The writing is too good for the content to be so stupid! Potentially I don’t understand extreme horror, it’s so predictable if you’re capable of imagining the next disgusting thing that could happen.

Cramps after putting heroin in your gf’s vagina? Overdose miscarriage!
Anal sex? Messy prolapse!
Into masturbating with a mannequin? Make a dude into a mannequin by sanding his dick off! 
Having a sex worker dilate her vagina when you have mom issues? Stick your head up there for rebirthing!

These are all predictions I made while reading the opening premise of chapters that came true by their end. I might try another book by this author just to see if they have ever tried more compelling subject matter.