Being called, or calling someone else, "Slave" is a desire that is about exploring roles and power dynamics in a sexual relationship. This term is often associated with submission, obedience and dominance. Some people find pleasure and satisfaction in being controlled or in control in a situation where roles are clearly defined. It's a form of play that can create a deeper connection between partners and add excitement and intensity to the interaction. It's important to find a partner who shares this desire and respects the boundaries set in terms of words and actions.