Toe fetishism has been defined as a pronounced sexual interest in the toe, mostly female toe. Extensions of this fetish include shoes and tickling.
Sigmund Freud considered toes binding as a form of fetishism. For a toe fetishist, points of attraction include the shape and size of toe and feet (e.g., long toes, short toes, painted toenails, high arches, soles etc.), jewelry (e.g., toe rings, anklets, etc.), treatments (such as massaging, washing partner's feet, or painting partner's toenails), state of dress (barefoot, flip flops, sandals, high heels, hosiery, socked feet, etc.), odor, and/or sensory interaction (e.g., rubbing the foot, tickling, smelling, kissing, biting, licking, sucking toes, rubbing genitals on foot, etc.) (Wikipedia)