I imagine you only get that in the usual staged online porn, made to cater to some men's weird fantasies. I doubt many real women would really be into any of that. Come to that, I doubt many women are into 90% of the pervy stuff out there that the producers of porn would make you believe is the 'norm'.
It's not about porn. I have met a few girls who are into fisting and stretching. I'm obviously not looking for the "norm" ha ha Just some insights from women into what my fetishes and hopefully their sare.