Category for Clitoral Jewelry, Labia Clips and Clamps, Clitoral Pumps, Pussy Pumps and Combination Clit & Nipple Pumps. Will also include automatic pumps which feature motor-driven suction. Apart from the visual appeal of swelling for you and your partner, the primary purpose is usually to heighten sensitivity of the region by drawing blood to the surface of the skin. Any manual stimulation thereafter will be increased in sensation.