It's a bit lax here, you can put it in any category that is most relevant to the work. In the example you gave, I'd put it under body horror as it's more to this pages' intention.
I've decided to not put in my work, I believe it'll look bad in this group despite the intention of work being horror/disgust. Despite that, thanks for replying to my question.
I'm sorry to hear that. Why do you think it will look bad?