The Vilcus dactyloadapter (adapter for fingers) was especially developed for people who like closing the electrical circuit with their own fingers.
Many people get a kick out of a direct contact with AC power supply. To that end, people normally use U-shaped fragments of bare wire, paper clips or even usual metal forks. All these gimmicks are unreliable, short-lived and, most important, tend to cause a short circuit or even an inflammation in the wiring.
Get yours at
http://www.artlebedev.com/everything/vilcus/