either flattened against the chest or so that they bulge. Breast torture: Torture of the breasts. Breath control play: Restriction of oxygen to heighten sexual arousal and orgasm. Methods to achieve this include strangulation, suffocation, and smothering. Butt plug: A sex toy that is designed to be inserted into the rectum for sexual pleasure. They come in a variety of sizes; some can vibrate. Sometimes used in Petplay, with a tail attached. Chastity: A form of erotic sexual denial or orgasm denial whereby a person is prevented from access to, or stimulation of, their genitals, save at the whim or choice of their partner. Often by means of a device that prevents contact and is controlled by means of a lock operated by the partner. Cock and ball torture (CBT): Torture of the penis and testicles for sexual gratification. Collared: Submissive or slave who is owned, usually (but certainly not exclusively) in a loving intimate relationship. A dominant may have multiple persons collared. Also: a pup's status, as differentiated from a "stray". Collaring: The formal acceptance by a dominant of a sub's service. Also the ceremony when a dominant commits to a sub (much like a wedding or other contract). Contrapolar stimulation: "Hurts so good!” A type of physical stimulation that incorporates feeling of both pleasure and pain. Consensual non-consent: Play where the parties agree to roleplay nonconsensual activities, such as kidnapping or rape. Consent: Mutual agreement to terms of action as in a scene or ongoing BDSM relationship. D/s: Dominance/submission: play or relationships that involve a psychologically based power exchange. DDLG: Daddy Dom/Little Girl, a subset of Dominance and submission. The name of this lifestyle refers to the nurturing relationship between parent/child where the dom takes on the role of a parent figure and the sub of a little girl. Dungeon monitor: Dungeon Monitor (DM), a person who supervises the interactions between participants at a play party or dungeon to enforce house rules – essentially, the bouncer of a BDSM event. They may also help in basic ways such as giving water to participants. Dom: A person who exercises control (from dominant – contrasted with sub). Dominant: A person who exercises control – contrasted with submissive. Domme: Woman who exercises control (see also Dominatrix). Often associated with a particular brand of traditional femininity; many younger female dominants prefer to use the nongendered terms dom/dominant. Dom-space: The euphoric state of