E-Stim is the abbreviation for electrostimulation (also known as electrosex) and describes a sexual practice that uses DC or low-frequency alternating currents for sexual stimulation. These are usually used for E-Stim developed devices - but it is also suitable TENS devices for E-Stim .. These are much cheaper than commercially available E-Stim devices. Tens Unit. Discussion in ''Masturbation'' started by Daretobare, Feb 2, 2017. Daretobare Member. My doctor prescribed me a tens unit a few years back for my lower back. It didnt take me long to start experimenting with it in other areas searching for pleasure. Got to where the pads would no longer stick so I packed it away.