Nice and sturdy, the large, all-encompassing Suckers will fully surround your or your partner's nipples (or clitoris, or other outer sweet spots) thanks to a big, circular opening. Press a Sucker against an erogenous zone in need/want of some suction, and simply twist the top car of your Sucker to activate suction. You'll be able to see the internal plunger mechanism rise as it draws your/their skin upward. Twist the cap in the opposite direction to release the internal pressure.