Feminist porn is political - men, women, transgender people, gays, lesbians, "queer" people, straight people, disabled people, people of colour, fat people - all are filmed on their own terms and express their own sexuality, industry figures say.
"It's a place where people with alternative sexualities can explore their sexualities," says Carey Gray, a female-to-male transgender pornographer and owner of a leather goods business.
"Trans-guys can look at me in performance and feel validated about their own bodies."
HM Anderson, a 41-year-old South Carolina mother of two, describes her affinity for feminist porn as a matter of taste.
"I just find mainstream porn to be very boring," she says. "It's just old. You're just like, 'jeez, really, that's what you think women do in bed?'"
Part Iranian and Tunisian porn star Arabelle Raphael, 25, complains that mainstream porn producers "whitewash" her ethnic looks or reduce her to an exotic, belly-dancing fetish object.
But the feminist pornographers "let me be me" - and give her much more say over what she does with her body in front of the cameras.
"If I'm not comfortable with something I'm not afraid to say no," she says. "I don't have to worry about never getting hired again."
The progressive-minded feminist porn audience is different from that of mainstream porn, too - it comprises straight and gay couples, straight and gay women, transgender people and "queer" people who reject the common categories of gender and sexuality - and comparatively few solo straight men.