There are circumstances in which looking itself is a source of pleasure, just as, in the reverse formation, there is pleasure in being looked at. Originally. in his Three Essays on Sexuality, Freud isolated scopophilia as one of the component instincts of sexuality which exist as drives quite independently of the erotogenic zones. At this point he associated scopophilia with taking other people as objects, subjecting them to a controlling and curious gaze. His particular examples center around the voyeuristic activities of children, their desire to see and make sure of the private and the forbidden (curiosity about other people’s genital and bodily functions, about the presence or absence of the penis and, retrospectively, about the primal scene). In this analysis scopophilia is essentially active. (Later, in Instincts and their Vicissitudes, Freud developed his theory of scopophilia further, attaching it initially to pre-genital auto-eroticism, after which the pleasure of the look is transferred to others by analogy. There is a close working here of the relationship between the active instinct and its further development in a narcissistic form.) Although the instinct is modified by other factors, in particular the constitution of the ego, it continues to exist as the erotic basis for pleasure in looking at another person as object. At the extreme, it can become fixated into a perversion, producing obsessive voyeurs and Peeping Toms, whose only sexual satisfaction can come from watching, in an active controlling sense, an objectified other.
Visual Pleasure and Narrative Cinema – Laura Mulvey