Sadist

Someone who takes pleasure in giving consensual pain or intense sensation to a willing partner.

In kink, a sadist is someone who enjoys giving pain or intense sensation to a consenting partner who wants to receive it. The key word is consenting: a kink sadist works within negotiated limits and a safeword, and cares deeply about their partner experience, which is what separates it entirely from harm. Sadism often pairs with masochism, the enjoyment of receiving such sensation. Many sadists describe their pleasure as coming from their partner pleasure.