Oct 5, - Today, we're going to talk about a vibrating clit pump. works is you actually create a seal over the clitoris and then you use the little pump ball. This is the principle used in the design of the clitoral pump -- a fun, effective sex toy. Clitoral pumps draw blood-flow into the genitals through a vacuum effect, enlarging the clitoris and making the whole area feel warm and more sensitive to the touch. Tips for effective.