One of the things you'll hear discussed over and over again in the Kink community is Consent. Everything we do revolves around the concept of Consent, and you'll rarely encounter any kind of Kink Education that doesn't have at least a quick mention of Consent, Respect, and Negotiation, which are all very inter-related concepts.
One of the ways we talk about Consent is to present various Consent Models to give a structure to how we discuss the concept. There are a lot of different models in use, and they all really come down to saying the same thing - "be sure that everyone involved in your kinkplay understands what's included and the risks they are taking, and agrees to participate without any coercion."