 A cock ring may be used during sex or masturbation to prolong or enhance erections, delay orgasm, or for the sensation of tightness and engorgement that wearing one produces; vibrating models apply vibration to the base of the user's penis and to their partner.They can be worn as sex toys or for aesthetic reasons.The purpose of a cock ring is to trap blood inside the penis in order to maintain an erection, or encourage a stronger erection.