Asshole Personality Disorder (APD) is the most common mental disorder found in humans. The disturbances caused by Asshole Personality Disorder are usually not suffered by the patient at all, but by those around him: tension headaches, frustration, impotent rage, high blood pressure, suicidal or homicidal urges and a complete failure of rational thinking processes when trying to deal with this asshole. Being subjected to someone's Asshole Personality Disorder can cause a wide-ranging and pervasive negative impact on relationships in work, home and social settings.