Dossie Easton photoDossie Easton, a San Francisco therapist, has been an active sex radical since 1961. While she is a well-known bottom, Dossie also tops, and has taught dozens of classes on S/M techniques, skills and philosophy. She was one of the first members of the Society of Janus in San Francisco, and has been a leader in the emerging area of S/M practice that links S/M and spirituality.