Complex (psychology) experiences that affect the psyche. Although they are normal, negative complexes can cause us pain and suffering. One of the key differences between Jungian and Freudian theory is that Jung's thought posits several different kinds of complex. Freud only focused on the Oedipus complex which reflected developmental challenges that face every young boy. He did not take other complexes into account except for the Electra complex, which he briefly spoke of (Carlini, 2005). After years of working together, Jung broke from Freud, due to disagreements in their ideas, and they each developed their own theories. Jung wanted to distinguish between
Penis envy by removing the man from the penis or the penis from the man). Freud's theories regarding psychosexual development, and in particular the "phallic stage", were early challenged by other psychoanalysts, such as Karen Horney, Otto Fenichel and Ernest Jones, though Freud did not accept their view of penis envy as a secondary, rather than a primary, female reaction. Later psychologists, such as Erik Erikson and Jean Piaget, challenged the Freudian model of child psychological development as a whole. Jacques Lacan, however, took up and developed Freud's theory of the importance of what he called ""penisneid" in the unconscious of women"