The castration complex is the primary figure under which Freud understands the internalisation of sexual difference. It first appears in his essay “On the Sexual Theories of Children” (1908) and thus precedes and underlies the later formulation of the Oedipus Complex, which appears in his “Contributions to the Psychology of Love” in 1910. In the 1908 essay Freud posits the idea, based on his case history of “Little Hans” (published in 1909), that the young boy perceives the possession of the penis as the “normal” condition and his sister’s lack of a penis as a defect. Because as this stage the female genitalia are not apparent, the girl child is also disposed to see herself as lacking the …
Clark, Robert. "Castration Complex". The Literary Encyclopedia. First published 22 October 2005; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=1601, accessed 18 April 2015.]