I learned from this episode that when women's sexualities are treated as dirty, unnatural, and things to be suppressed on a cultural level for hundreds and hundreds of years, they have a definite potential to ferment into something terrifying.
While I don't doubt that fetishes and fetish communities would still exist if everyone could express their sexualities openly and healthily, because sometimes perverts will be perverts no matter the outside influences, I have a hard time believing that, if female sexuality wasn't so demonized and forcibly kept private, online communities of women whose maternal instincts have mutated into a sexual attraction towards sick people would be a thing that existed.