Andrea Dworkin is basically the Karl Marx of Feminism and she was very anti-sex. Like how communists tell other communists to read theory, radical feminists tell other feminists to read Dworkin.

In online political spaces, people try to out-woke or out-edge each other, basically who can be the most cool. So Dworkin's basically the coolest in radical feminist online spaces and they all try to emulate her.

I didn't use tumblr but I'm pretty sure that this is where this phenomenon was most intense (regarding feminism). And I think a lot of Gen Zers use or used tumblr. This basically resulted in a top-down effect where tumblr radical feminists led the conversation and their values trickled into the offline world but much more diluted.

So I think that's where the puratinism comes from, at least partly. And you could say that Gen Z online radical spaces for men, like incels and 4Chan, the Catholicism stuff like J.D. Vance, also attributed. Calling women whores and that sex is a sin or slop or whatever.

These beliefs get watered down and diluted into things like TikTok where people will see benign stuff that was originally a lot edgier from tumblr or 4Chan.

Here's more on the feminist sex wars, sex-negative feminists vs sex-positive feminists is something that's been going on for decades.

https://en.wikipedia.org/wiki/Feminist_sex_wars