"What Every Mental Health Professional Needs to Know About Sex, Third Edition" is a book that provides information to therapists who are interested in discussing sexual health matters with their clients. The book covers a wide range of topics related to sexuality, including how to assess and treat sexual pain disorders, sexuality across the lifespan, and more. The book also includes "Step into My Office" vignettes that offer a glimpse into the therapeutic process. The third edition of this book is a pragmatic resource that assists mental health professionals in helping clients resolve sexual concerns that arise.