I have designed a 3D printable skull vaginal or anal Monopole Conductive Rubber Electrode that I am calling my Skull-Fuck.

Each Skull Electrode will be printed in my trademark YELLOW PLA. This insulator comes with 10"/25cm of 6mm conductive rubber tubing that takes 2mm plugs.

It will be dispatched un-painted but with 6mm conductive rubber tubing already fitted. One side of the Conductive Rubber loop has a pin fitted to secure it in place. Your TENS cable plug secures the other end; you can remove this pin to allow two plugs to attach to this electrode from different channels if you use a Tri-phase set-up to make it the base connector.

Just plug in your 2mm plug and then insert it into your vagina or anus before switching on your control box and experiencing some e-stim pleasure.