Michael E. Metz, PhD, is a psychologist and marital and sex therapist in private practice in Minneapolis/St. Paul, MN, treating individuals and couples. For 12 years Dr. Metz served on the faculty of the University of Minnesota Medical School, Department of Family Practice & Community Health, directed the marital & sex therapy program, and for 18 years served as adjunct assistant professor with the University of Minnesota's Department of Family Social Science. He is a major spokesperson for a comprehensive, integrated biopsychosocial approach to addressing and resolving relationship and sexual problems. As a clinician he has worked with more than 6,000 couples for a variety of relationship and sexual problems

Barry W. McCarthy, PhD, is a certified marital and sex therapist and practices at the Washington Psychological Center, USA. He was recipient of the 2009 Smart Marriages Impact Award