From the manufacturer : " Stud 100 has been around since the early 1980's. Stud 100 uses lidocaine to numb a man's penis. STUD 100 World Famous Delay Spray for Men helps in the prevention of over-rapid ejaculation. It is also used for reducing oversensitivity in the male in advance of intercourse. Discreetly packaged, STUD 100 provides a pre-measured metered spray application for complete control and ease of use. STUD 100 also contains the benefit of a light skin lubricant, is colorless and odorless" Sold as a novelty only.