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In certain perversions of the sexual instinct, the person, part of the body, or particular object belonging to the person by whom the impulse is excited, is called the fetish of the patient. [E. Morselli in "Baldwin Dictionary of Philosophy," 1901]Related: Fetishist (1845; psycho-sexual sense from 1897).
fetishism fet·ish·ism (fět'ĭ-shĭz'əm, fē'tĭ-)
The act of using a fetish for sexual arousal and gratification.