Image by mbg Creative. When you think of sex toys, your mind probably conjures images of the usual suspects—colorful dildos, pulsating vibrators, or even the furry handcuffs you have in the back of your closet. But there is one type of toy many people tend to overlook: the clit pump and all its underrated suction glory. Clit pumping is the use of a suction device on the clitoris to increase blood flow, says Laurie Mintz, Ph. Clit pumps are typically made up of a cylindrical cup and a hand pump. The cylinder is placed over the entire external clitoris, and as you squeeze on the pump, blood is pulled to the clitoris.