You are the master - make your slave silent, do whatever you want with her, fulfill your innermost desires, everything, until she can speak. It gives helplessness, accelerates the heartbeat. This is just an element of the role, which does not entail serious physical limitations. This is an option of psychological humiliation. An ideal experience for beginners. No bondage session will be brought to its logical conclusion if you don't have this wonderful gag at hand.
