The Eroscillator is a vibrating sex toy designed to be used on the clitoris to achieve orgasm or on the penis to induce erection and orgasm. It differs from other vibrators because it uses an oscillating head (somewhat like an electric toothbrush) rather than the vibrating body seen in most sex toys. The toy is said to be very effective at producing female orgasm, and has been recommended by acclaimed American sex therapist Dr. Ruth Westheimer.