Sigmund Freud used the term "scopophilia" to describe, analyse, and explain the concept of , the pleasure in looking, a curiosity which he considered a partial-instinct innate to the childhood process of forming a personality; and that such a pleasure-instinct might be sublimated, either into Aesthetics, looking at "objets d'art" or sublimated into an obsessional neurosis "a burning and tormenting curiosity to see the female body", which afflicted the Rat Man patient of the psychoanalyst Freud. From that initial interpretation of "Schaulust" arose the psycho-medical belief that the inhibition of the "scopic drive" might lead to actual, physical illness, such as physiologic disturbances of vision and eyesight. In contrast to Freud's interpretation of the "scopic drive", other psychoanalytic theories proposed that the practices of scopophilia might lead to madness — either insanity or a mental disorder — which is the scopophilic person's retreat from the concrete world of reality into an abstract world of fantasy.