It's worth noting that despite higher voltages here there aren't more deaths or injuries - but maybe it's because people take it more seriously. Admittedly no one I know is nuts enough to use body parts for "liveness testing".
(sorry for being kinda late in this discussion) I've never felt the urge to do so either, maybe I'm just a wimp. ;-) But here is a something I've heared from people who do/have or know people who do have. And usually they are people with a degree in the field of electronics: use the back of the hand don't grap wires, when current passes through your body, muscles contract and you don't want to hold on to it when those muscles make a fist or more that arm towards your body. You just want to touch it lightly. Just to make things clear, I am NOT going to suggest you should do so, just telling you what I think I heared.