Is that FETISH, coming from a medical context, it is a sexual fixation of a non-general body part or non-human object. The fetish is the role that plays in one’s sexual response and it’s an object or situation in order to achieve arousal or climax. Examples of fetishes could be clothing, shoes, leather, Latex, feet and more common in the kink community could include activities as water sports, smoking etc.

KINK is more of a stimulating act that results as sexual pleasure but it is not something that one needs for sexual arousal. It is a very personal intimate practice or activity that involves non-fantasy concepts. Could be sexual but it is not always the case and you can have a kink that comes from an emotional pleasure not necessarily physical. Examples could be pet play, flogging, spanking, bondage, sensory deprivation. There are not many kinks that go into fetish categories.