>>2143841if you're going to get technical, in the DSM, rather than the dictionary, the "part of the body" is removed and instead it's about whether you are capable of sexual activity without its presence, whether in physicality or thought.
anything CAN be a fetish, for someone, in the technical sense. is it? hard to say. but probably.
for myself? bondage and latex. can get excited, can get in the mood, but can't actually get any further than that without both.