by women of male-made lesbian erotica (such as by David Hamilton) was signaled also by Tee Corinne. Some pornography is made by lesbians, such as the defunct lesbian erotic magazine On Our Backs; videos by Fatale Media, SIR Video, Pink and White Productions, and BLEU Productions; and web sites such as the CyberDyke Network. A PornHub report indicates that "lesbian", "orgy", "BDSM" are the most popular category for female viewers of its porn portal. The category was 151% more popular with women than with men. Mainstream inauthenticity Mainstream lesbian pornography is criticized by some members of the lesbian community for its inauthenticity. According to author Elizabeth Whitney, "lesbianism is not acknowledged as legitimate" in lesbian porn due to the prevalence of "heteronormatively feminine women", the experimental nature, and the constant catering to the male gaze, all of which counter real life lesbianism. A study conducted by Valerie Webber found that most actors in lesbian porn consider their own pornographic sex somewhere on a spectrum between real and fake sex, depending on several factors. They were more likely to consider it authentic if there was a real attraction between themselves and the other actor(s) in the scene, and if they felt mutual respect between themselves and the producers. Authenticity in porn is disputed because some assert that the only authentic sex has no motive other than sex itself. Porn sex, being shot for a camera, automatically has other motives than sex itself. On the other side, some assert that all porn sex is authentic since the sex is an occurrence that took place, and that is all that is needed to classify it as authentic. With regard to the authenticity of their performance, some lesbian porn actors describe their performance as an exaggerated, altered version of their real personality, providing some authenticity to the performance. Authenticity depends on real life experiences, so some lesbian porn actors feel the need to create an entirely different persona in order to feel safe. Webber writes of Agatha, a queer actor in lesbian porn who "prefers that the activity and ambiance of her performances be very inauthentic, because otherwise it feels 'too close to home, referring to the oppression and verbal abuse she is subject to by homophobic men in her daily life. Penetration Like in straight and gay male porn, there is an emphasis on penetration in lesbian porn. Even though studies have found