More than two million cases can be found altogether in psychological and psychiatric records of multiple personality disorder also called dissociative identity disorder. It is often thought that multiple personality disorder is a trick, a bizarre form of "play-acting" that is committed by manipulative, attention-seeking individuals. It is not. Multiple personality disorder is a "disorder of hiding" wherein 80-90% of multiple personality disorder patients do not have a clue that they have the disorder. Most know that there is something wrong with them; many fear that they are crazy, but few know that they have a disorder.
             What is Multiple Personality Disorder?
             Multiple personalities is a dissociate reaction to stress in which the patient develops two or more personalities. Each personality has a distinct, well-developed emotional and thought process and represents a unique and relatively stable personality. The individual may change from one personality to another at periods varying from a few minutes to several years. The personalities are usually very different and have different attitudes; one may be happy, carefree and fun loving, and another quiet, studious, and serious.
             People can have up to fifty personalities or more. All personalities usually will have their own name and their own role. For example one personality can be the keeper of pain, his role is to take and feel all the pain that the other personalities come in contact with. The personality also can have their own appearance, but this does not mean the person changes its outer image it is just the way he/she sees inside his/her head. The personalities will also have different ages, talents, and likes and dislikes. For example:
             In the novel, The Minds of Billy Miligin, there was a man who had twenty-four personalities. All of his twenty-four personalities were different. They had different ages, their own appearance, and some were of the opposite sex....