Glossary: Good pain and bad pain are terms used lightheartedly by BDSM practitioners, signifying that whilst BDSM may include an element (often quite pronounced) consensual pain, there is a purpose to it, and some pain is consented to and accepted whilst other pain is not. 'Bad pain' is pain which is outside hard limits, non-mutual or non-valued, not wished for, and of limited or no value in this context.