David Ortmann is a licensed psychotherapist, sex therapist, educator, keynote speaker, and author living in New York City and San Francisco. David is a dynamic, engaging and passionate therapist and healer, bringing seventeen years experience to the practice of psychotherapy and sex therapy, and offers exclusive individual and relationship sessions in both his San Francisco and Manhattan offices. He was one of the founding members of the Community-Academic Consortium for Research on Alternative Sexualities (CARAS) in 2005, and continues to serve as an expert witness, regarding the psychology, scope, process, and ritual of consensual BDSM sex for civil and criminal cases. Rowman and Littlefield published his groundbreaking book, co-authored with Richard Sprott, PhD, Sexual Outsiders: Understanding BDSM Sexualities and Communities, in December 2012.