BDSM is thought about as a safe thing to do if it does some things. These things are often said in one of two different ways. The first way they are said is to say "Safe, Sane, and Consentual" (SSC). The second way they are said is "Risk Aware Consentual Kink" (RACK). What those sayings mean is that both people have to agree on what to do. They also have to be safe, which means that they have to know the risks and be careful. People who do BDSM play are very careful to follow those rules because they can hurt or kill their partner if they do not.