It's not a sexual fetish.
fetish c : an object or bodily part whose real or fantasied presence is psychologically necessary for sexual gratification and that is an object of fixation to the extent that it may interfere with complete sexual expression
sexual preference/orientation 2 : a usually general or lasting direction of thought, inclination, or interest
Just like you prefer the opposite sex, some prefer the same sex, others prefer... children... :sweatdrop