The Bad Boy fits easily into the anus and rests against the prostate. When the included vibrating bullet is activated the Bad Boy goes to work, stimulating the areas of the man. As the man rocks back and forth he'll get the sensation of having a partner's finger inside of him probing and working on him. The hands-free action that is possible will allow for the man to enjoy himself as much as possible.Specifications: The Bad Boy massager is made of medical grade silicone. It's 100% waterproof so it can be used in the shower or bath area. The Bad Boy measures 6.5" of insertable length and 1.25" in diameter.