A perineum massager is a vibrating sex toy designed to stimulate the area between the anus and testicles, called the perineum.
The tapered end of the massager is inserted inside the anus. From here, the tip internally massages the perineum. This internal massage is thought to increase the stimulation and result in stronger orgasms. Most models have a control dial in the base to help regulate the intensity of the vibrations.