Dominant sex chats
She is required to stay in the same posture, such that the vase over her does not fall (top).
A human-table formed using three nude submissive women (bottom).
In contrast, the terms "top" and "bottom" refer to the active (agent) and passive (patient) roles, respectively.
In a given scene, there is no requirement that the dominant also be the top, or that the submissive be the bottom, although this is often the case.
It is usually a code word, series of code words or other signal used to communicate physical or emotional state, typically when approaching, or crossing, a boundary.
Safewords can have differing levels of urgency - some may bring a scene to an outright stop, whereas others may indicate that a boundary is being approached.
It may have roots in the military, where new recruits are required to refer to themselves as "this recruit", rather than "I" or "me".
Human furniture: A nude submissive woman being used as a decorative table.
Those who take the superior position are called "dominants"—Doms (male) or Dommes (female)—while those who take the subordinate position are called "submissive"—or subs (male or female). Two switches together may negotiate and exchange roles several times in a session.
Some people in the D/s world capitalize words and names that refer to dominants, and do not capitalize those that refer to submissives, hence the capitalization of D/s; others do not.
It was popularized in internet chatrooms, to make it easier to identify the orientation of the writer or the person being written about.
In human sexuality, this has broadened to include mutual exploration of roles, emotions, and activities that would be difficult or impossible to act out without a willing partner taking an opposing role.
A 1985 study suggests that only about 30 percent of participants in BDSM activities are females.