Cock Rings are worn by men to reduce the blood flow from the penis causing it to stay harder for longer. They can be used by men with erection difficulty or for men who want extra stimulation. Some cock rings feature vibrating bullets built in which vibrate the penis and can stimulate their partner with each thrust. Clit tickers can be a feature of penis rings so that with each thrust the tickler comes in contact with the clitoris providing the woman with extra stimulation. Some cock rings have rings which also go over the balls for a tightening feel which can make orgasms more powerful.