Oh, I understand now, you are asking about the cock rings. Cock rings can really improve performance if they are chosen and worn correctly. Here are some tricks for wearing a ring and make the play enjoyable.

As for vibrating cock rings, there are different types, and it is also important to know how to choose them. Read about the main features of vibrating cock rings here.

From my personal experience, those that come with a large clit-attachment, such as Vito, Zeal, or Intimus work best for me. And I've found that my most pleasurable experience with the cock rings is in a cowgirl position.