fetishism (n.) Look up fetishism at Dictionary.com
1801, "worship of fetishes;" in the purely psycho-sexual sense first recorded 1897 in writings of Henry Havelock Ellis (1859-1939), from fetish + -ism.
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).