fetish

noun5

1. •
   Something which is believed to possess, contain, or cause spiritual or magical powers; an amulet or a talisman.

   • The idols and fetishes were being dressed up and whitewashed, receiving sacrifices. — 1958
2. •
   Sexual fixation to or arousal at something abnormally sexual or non-sexual, such as an object or a non-sexual part of the body.

   • I know a guy who has a foot fetish.
3. •
   An irrational or abnormal preoccupation or fixation on some object or activity; an obsession.

   • He has been talking about the same topic for hours on end, I suspect he may have a fetish
4. •
   (old-fashioned) A figure representing the spirit of a deity, human, or animal; an idol or voodoo doll.
5. •
   A recurrent theme of a specific thing.