Three Essays on the Theory of Sexuality

Freud assembles three linked essays that treat sexuality as something built up in stages rather than switched on at puberty. The first separates the sexual aim from the sexual object and reads the perversions not as alien pathology but as exaggerations of tendencies latent in everyone.

The second locates the origin of this material in infancy: component drives bound to the mouth, the anus, and the skin, autoerotic and only later gathered toward a single object. The third follows puberty, where these partial currents fall under genital primacy, and distinguishes fore-pleasure from end-pleasure.

For the clinician the value is a developmental grammar: adult symptoms and character can be traced to the fixations and reversals of these early component drives, which is why Freud kept revising the text across editions between 1905 and 1924. It supplies the account of libido on which much of the later technique rests.