This book addresses the fundamental importance of the proper assessment and treatment of sexual disorders in patients with mental disorders with regard to their treatment outcomes and adherence to therapies.  In fact, patients with mental disorders often suffer from sexual dysfunctions and in many cases, pharmacological treatment causes sexual-dysfunction side-effects. However, anxiety disorders, personality disorders, eating disorders and psychotic disorders are often also characterized by sexual symptoms that have a profound impact on sexual function.   The psychopathology of sexual behavior investigates deficits in the mind-body relationship that are expressed through sexual symptoms such as erectile dysfunction, premature ejaculation, vaginismus, orgasmic disorders, or lack of sexual desire. These symptoms can be considered both prodromal and as a consequence of psychological or psychiatric suffering.