David M. Ortmann, LCSW, is a psychotherapist, sex therapist and author in private practice. His work has been published in journals, magazines, and anthologies of fiction and non-fiction. His areas of clinical focus and study are the sexuality of the BDSM, Leather and Kink communities, concepts and theories of masculinity, and the processes of human attachment and differentiation. He speaks locally and nationally in an effort to promote Leather, Kink, and BDSM community visibility and improve clinical psychotherapeutic interventions for these populations. Ortmann is a member of The National Coalition for Sexual Freedom (NCSF), The American Association of Sexuality Educators, Counselors, and Therapists (AASECT), the Northern California Society for Psychoanalytic Psychology (NCSPP) and is one of the founding members of the Community-Academic Consortium for Research on Alternative Sexualities (CARAS).