moment such as sensate focus exercises. Dr. Helen Singer Kaplan modified some of Masters and Johnson's ideas to better suit her outpatient practice, including introducing medication. Both integrated cognitive behavioral therapy into their practice and Kaplan used psychodynamic therapy as well. The work of Jack Annon in 1976 also saw the creation of the PLISSIT model that sought to create a structured system of levels for the therapist to follow. The mid-1980s saw the medicalization of sex therapy, with a primary focus on male sexual dysfunction. The 1990s brought penile injections and medications such as Viagra as well as the marketing of antidepressants for their delayed ejaculation side-effects. Hormone therapy was introduced to assist both male and female sexual dysfunction. Dilators were used to treat women with vaginismus and surgical procedures to increase the size of the vaginal opening and treat vulvar pain were also introduced. See also Certified Sex Addiction Therapist Certified Sex Therapist List of sex therapists Sensate focus Sexual assistance Society for Sex Therapy and Research References Bibliography Kaplan, Helen Singer, The New Sex Therapy: Active Treatment Of Sexual Dysfunctions, New York, Brunner/Mazel, 1974. Robboy, Alex Caroline, "How to Become a Sex Therapist"