I actually used to stick my fingers in light bulb sockets when I was very young. I can't explain why, I just did. Now I hate working on anything electrical. Whenever I have to work on electrical stuff, I have to triple check the power to be certain I'm not going to get zapped. When I was in college, we had a machine that used a microscope on it that always had a minor electrical leak to the scope objective. After several shocks to my eyelids, I had to stop using that brand of machine just out of fear. Before I had my bilateral carpul-tunnel surgery, I was required to undergo a nerve conduction study, which is basically getting electrocuted about a dozen times for each side of the body. After that, I've learned to live with pain, rather than ever getting another test like that.