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 slave master or mistress might be any person or group, though the majority of such relationships are usually either one dominant, or a committed dominant couple, owning one or more slaves.A sex slave and the owner, and others involved in the relationship, can be of any gender, sexual identity, or orientation.Such a collar is generally not removed except for practical reasons such as medical or security requirements, unless or until the relationship is dissolved; however, a slave is sometimes permitted to wear a more subdued (or less obtrusive) one outside of the home — for example during work or in social situations with people who may otherwise feel uncomfortable.
If the trainee is also a masochist, the aversion to physical pain may be lacking, in which case psychological or emotional discomfort may be employed to create the unpleasant result that punishment requires.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.The term "slave" is used rather than "sex slave" because sex is not a necessary component of consensual slavery. Not all submissives are slaves, though all slaves would normally be considered submissive in the relationship.These contracts may also deal with domestic arrangements (such as cleanliness, home duties) and interpersonal relationship matters (such as issues of deference, language, etc.), besides the sexual arrangements.Typically, they would provide that the Master has the exclusive authority in all matters relating to the body and behavior of the slave, including underwear and other clothing, social relations outside of the arrangement, etc.
However, some calling themselves "slave" may only be submissive within a sexual context/activity whilst others are also submissive within other or all aspects of the relationship, "sex-slave" or "slave" respectively.