Cynthia Slater (August 7, 1945 – October 26, 1989) was an American sex educator, HIV/AIDS activist, professional dominatrix, and co-founder of the Society of Janus—the second BDSM organization founded in the United States after New York’s Eulenspiegel Society. With Larry Olsen she launched Janus in San Francisco in August 1974. Openly bisexual and deeply rooted in leather culture, Slater spent the late 1970s and 1980s forcing open space for women in male-dominated SM rooms, teaching safety, and building kink-aware safer-sex education as AIDS hit the scene.
Society of Janus and the meaning of the name
Janus began as a San Francisco BDSM education and support group and remains one of the foundational community institutions of American kink. Slater explained the name with three reasons. First, the two-faced god mirrored SM duality—dominant and submissive sides in one person. Second, Janus as Roman god of portals and of beginnings and endings stood for the start of self-acceptance, freedom from guilt, and the eventual end of self-loathing about SM desire. Third, Janus as god of war named the fight against stereotypes aimed at kink practitioners. That framing—psychology, initiation, and political struggle—still sounds like modern dungeon mission statements.
Women in leather, Catacombs, and “SM 101”
Slater’s push for women to be accepted in San Francisco’s gay leather scene brought her wider attention. She persuaded management at the Catacombs—the most famous fisting club of its era, open 1975–1981 and again 1982–1984 at a second location—to admit lesbians into what had been a gay men’s space. She was an early public champion of S/M safety. In the late 1970s she hosted Society of Janus safety demonstrations that carved room for women inside a culture already dense with gay men across leather, kink, and fetish circles. First-hand accounts credit her with coining “SM 101” for those foundational safety classes and demos—the phrase scene educators still use for beginner-level consent and technique teaching.
AIDS work, Mapplethorpe, and professional domination
In 1981 Slater and David Lourea presented safer-sex education workshops in San Francisco bathhouses and BDSM clubs. HIV-positive herself, she organized the first Women’s HIV/AIDS Information Switchboard in 1985 and helped develop and spread kink-friendly safer-sex tools and practices. Robert Mapplethorpe photographed her in 1980—another bridge between leather realness and high art. She worked as a professional dominatrix while staying openly bisexual, modeling a career path many women in SM still recognize: paid dominance, community teaching, and political crisis response at once.
Death and lasting honors
Slater died of AIDS complications on October 26, 1989. She is commemorated on the AIDS Memorial Quilt. Honors stacked across decades: the National Leather Association International’s Jan Lyon Award for Regional or Local Work (1989); the Forebear Award in the Pantheon of Leather Awards (2003); NLA International’s Cynthia Slater Award for non-fiction SM/fetish/leather writing when excellence-in-writing awards launched in 2007; Leather Hall of Fame induction in 2014; a metal bootprint with her name and a short statement in the 2017 San Francisco South of Market Leather History Alley; and induction into the Society of Janus Hall of Fame.
For BDSM readers, Slater is not a footnote to Janus—she is why “SM 101,” women’s access to fisting clubs, and AIDS-era kink education have a named pioneer. American BDSM organizing has a short founding list: Eulenspiegel in New York, then Society of Janus in San Francisco; she co-built the second node and filled it with safety demos, women’s access fights, and later AIDS education when the scene could have closed ranks instead of teaching. Opening the Catacombs to lesbians was a structural change to the most famous fisting club of its day; coining “SM 101” gave educators a durable beginner label. Leather bars and play spaces that take gender inclusion and safer sex as defaults are living inside structures she helped force open under crisis conditions. If your local group still runs SM 101 and posts safer-sex rules beside the flogging bench, you are in her wake.
