The mother-son relationship has also been a focal point in psychological explorations of human behavior. The Oedipus complex, a concept introduced by Sigmund Freud, refers to the unconscious desire of a son for his mother and the accompanying feelings of rivalry with his father. This concept has been explored in various literary and cinematic works, including Sophocles' Oedipus Rex and Ingmar Bergman's Persona (1966). These stories often probe the complexities of human desire, identity, and the unconscious.