In the context of BDSM, a top is the term given to the individual who assumes the controlling or dominant role over a submissive participant or bottom. Tops are often in complete control of their submissive partners. For example, they may humiliate them, punish them, and order them to perform certain sexual acts.
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Tops are known by many names. The names that they choose to use are largely determined by gender and personal preference. A female top may be referred to as a Mistress, Dominatrix, Madam or Mommy. A male top may be referred to as a Master, Dominant, Sir or Daddy.