A sex therapist is a licensed mental health professional – a clinical psychologist, social worker, counselor, or marriage and family therapist –  who has chosen to specialize in addressing issues related to sexual health, intimacy, and relationships. Sex therapists commit to specialized training to help individuals and couples overcome sexual difficulties, improve sexual function, and enhance overall sexual well-being. Some sex therapists choose to pursue formal certification in sex therapy, though this is not required in order to provide competent support. The American Association of Sexuality Educators, Counselors, and Therapists (AASECT) is the organization that oversees certification for Certified Sex Therapists (CSTs).