FIXATION: When one's desire is tied to an object of desire connected to an earlier phase in one's psychosexual development. Example: a fixation on oral pleasure, which Freud would see as "stuck" at the oral phase even though other aspects of one's development may have proceded normally: "I regard it as possible in the case of every particular sexual trend that some portions of it have stayed behind at earlier stages of its development, even though other portions may have reached their final goal" (Introductory Lectures 16.340). This term is closely related to regression. See also Freud: Module I on psychosexual development.