These nippesuckers are very simple to use: You squeeze them, put them on your nipple and as you push them down you stop squeezing. The thicker rings on the exterior pull outwards to create suction. This creates a vacuum and sucks your nipples in. The broader base makes sure these suckers attach firmly around your nipple and hey are slightly curved in a way that makes them pull on your nipples even more. The opening is wide enough to even fit over a piercing. These HUJU Nipplesuckers are perfect for nipple-play lovers. They feel amazing and look super sexy!