Samois

Samois was a lesbian feminist BDSM organization based in San Francisco that existed from 1978 to 1983. It was the first lesbian BDSM group in the United States. It took its name from Samois-sur-Seine, the location of the fictional estate of Anne-Marie, a lesbian dominatrix character in Pauline Réage's erotic novel Story of O, who pierces and brands O. The co-founders were writer Pat Califia, who identified as a lesbian at the time, Gayle Rubin, and sixteen others.

The roots of Samois were in a group called Cardea, a women's discussion group within the mixed-gender BDSM group called the Society of Janus. Cardea existed from 1977 to 1978 before discontinuing, but a core of lesbian members, including Califia and Rubin, were inspired to start Samois on June 13, 1978, as an exclusively lesbian BDSM group.