In BDSM, Master/slave or M/s is a relationship in which one individual serves another in an authority-exchange structured relationship. Unlike Dominant/submissive structures found in BDSM in which love is often the core value, service and obedience are often the core values in Master/slave structures. The participants may be of any gender or sexual orientation. The relationship uses the term “slave” because of the association of the term with ownership rights of a master to their slave’s body, as property or chattel. While male “masters” will usually be referred to as “Master,” whether or not female Masters are referred to as “Master” or “Mistress” may depend upon whether they identify as following the “Leather” or BDSM path.:27-30
The Master/slave (or owner/property) relationship is entered into on a consensual basis, without the legal force of historical or modern non-consensual slavery, that is forbidden by the laws of most countries.