The cups can be used virtually anywhere on your body - but they really feel great on the nipples clit buttocks or any other erogenous zone. Each cup has its own built-in release that instantly relieves pressure when you pull the black pin. To use lightly lubricate the skin first then attach the flexible hose to the valve on the top of each cup. Pull the EZ-grip trigger and watch your partner's skin rise with suction. After you've reached your desired tension remove the hose from the cup and the suction will remain constant until you pull the pin.