A device designed to take rotary power from an external power source such as a cordless electric screwdriver and transmit that energy into both rotary and reciprocating linear activation of sexual devices used by both males and females for the purpose of masturbation and auto-stimulation is disclosed. The combination of rotational stimulation with reciprocating linear stimulation is apparently remarkably satisfying despite the absence of such stimulation during normal person-on-person sexual contact. The device is simple, light weight, small, powerful, modestly priced, handheld or hands-free, user serviceable, hygienic, gender neutral, sexual orientation neutral, convenient, rugged, multi-motion, safe, reliable, quiet, fully submersible, positionally versatile and sexually satisfying.