Nipple suckers create a seal around the nipple and increase the air pressure to draw blood to it and sometimes make it bigger. This makes the nipple more sensitive to any kind of stimulation once they are removed. Some are adjustable in the sense that you can control how much suction is being applied to the nipple, however many are a simple squeeze-style which simply “suck” the nipple. Check out our blog for everything you could possibly need to know about nipple suckers!