Consent within BDSM is when a participant gives their permission for certain acts or types of relationships. It bears much in common with the concept of informed consent and is simultaneously a personal, ethical and social issue. It is an issue that attracts much attention within BDSM, resulting in competing models of consent such as Safe, sane and consensual and Risk-aware consensual kink. Observers from outside the BDSM community have also commented on the issue of consent in BDSM, sometimes referring to legal consent which is a separate and largely unrelated matter. However, the presence of explicit consent within BDSM can often have implications for BDSM and the law and, depending on the country the participants are in, may make the differences between being prosecuted or not.
Where an act has been previously consented to, the consent can be terminated at any point, and by any participant, through using a safeword. Within the BDSM community, it is generally considered a high risk activity to engage in BDSM without a safeword. Acts undertaken with a lack of explicit consent may be considered abusive and those who ignore the use of a safeword may be shunned within the BDSM subculture.