  The exemplar of this phantasmatic activity of the unconscious is the Oedipal Complex. In Freud's later writings on femininity, including “Femininity” (1933), “Female Sexuality” (1931), and “On the Psychological Consequences of the Anatomical Distinction between the Sexes” (1925), Freud postulates that the little girl's Oedipal Complex runs a different course than the little boy's and holds a different relation to castration anxiety. Crucially, Freud maintains that femininity cannot be grasped from a biological or conventional perspective (Freud 1968 [1933], 114). Another way of putting this is that sexual difference is centrally concerned with psychical reality rather than material reality, with the realm of fantasy rather than nature or culture. The Oedipal story is the story of psychic development, the story of how we become subjects and in becoming subjects, how we become sexually differentiated.