Erotic electrostimulation (also known as electrophilia or electrosex) is a human sexual practice involving the application of low-frequency electrical stimulation to the nerves of the body, with particular emphasis on the genitals, using a power source (such as a TENS, EMS, Violet wand, or made-for-play units) for purposes of sexual stimulation. Electrostimulation has been associated with BDSM activities, and erotic electrostimulation is an evolution of that practice. Erotic electrostimulation is the use of electrostimulation in an erotic or sexual manner versus the more sadistic or painful applications in BDSM.