What can be a fetish? Well, anything really. There are body part fetishists who worship feet or breasts, buns or hair. Then there are object fetishists who like to be intimate with inanimate objects: the shoes, the panties, the bra, the hat, the handcuffs, the dildos, the cold steel, the cyberskin.
Then there are "action fetishists." The voyeurs who fetishize watching. The exhibitionists who fetishize being watched. The oral and anal sex fetishists. The masturbators of every stroke and style.