fetish

noun

• an inanimate object worshiped for its supposed magical powers or because it is considered to be inhabited by a spirit.
• a course of action to which one has an excessive and irrational commitment:he had a fetish for writing more opinions each year than any other justice
• a form of sexual desire in which gratification is linked to an abnormal degree to a particular object, item of clothing, part of the body, etc.:Victorian men developed fetishes focusing on feet, shoes, and boots