Penis rings are more commonly thought of as devices that assist in maintaining an erection than as sex toys. It’s true that the right kind of penis ring can help you prolong an erection. But penis rings can offer a world of pleasurable sensations, too. By changing the way your erection feels, a penis ring not only changes how sex play feels, but it heightens your awareness of your body when you are turned on. Some people also use penis rings as body adornment.