There are a million ways to go down on someone, and one popular favourite for many is facesitting - where one person, usually (though not always) someone with a vulva, sits on their partner's face to be pleasured orally from underneath. Some fans simply enjoy the sensation; it's a pretty intense feeling, and the sitter is completely in control of things like speed and force in a way that makes it easier for a lot of people to climax. For others, though, this act of smothering is part of a BDSM dynamic and perhaps a kink in its own right. Fullweight facesitting comes with heavy overtones of control and domination, and can feel like a wonderful act of service from the person being sat upon.