Dr. Zvi Zuckerman is a medical doctor and certified sex therapist. Dr. Zuckerman was certified as a supervisor of sex therapy by the American Association of Sex Educators, Counselors and Therapists (AASECT) and as a marital and sex therapist by the Marriage Council of Philadelphia at the University of Pennsylvania. He serves as a professional consultant for the Between Us Clinic, which offers the PE Program, an online home exercise program for treating premature ejaculation.