fetish
From Longman Dictionary of Contemporary Englishfetishfet‧ish /ˈfetɪʃ/ noun [countable] 1 SYa desire for sex that comes from seeing a particular type of object or doing a particular activity, especially when the object or activity is considered unusual a leather fetish2 OBSESSIONsomething you are always thinking about or spending too much time doing → obsessionfetish for/about Sue has a real fetish about keeping everything tidy.Origin fetish (1600-1700) French fétiche, from Portuguese feitiço “artificial, false”