Duality was a surrealist project that explored the internal organs of human beings and the curiosity and fear this arises. Carl Yung, the psychoanalysis suggested theories of Duality like the Dark Shadow theory. This theory implies that everyone has this dark shadow, within their unconscious mind. This shadow tends not to be acceptable to speak about in society which causes complications. Yung states to become truly whole an individual has to integrate with their dark shadow. If this is repressed, more serious circumstances can arise.