My husband used to work in an adult store... they sell rings that vibrate but I don't think they're desensitizing ones. There are also gels and creams you can apply to the head of your penis (only the head!) and that'll desensitize it enough so you can enjoy sex and not ejaculate so quickly. Be careful though... the creams not only desensitize you, but they'll also desensitize her as well. *And some feel like a burning sensation to the women! I have that problem...*