you've all seen one before, a lamp that turns on when you touch a metal part of it. i was wondering how they worked...? Here are my ideas on how it works: well it cant be sending an electric current through you, that would just be dangerous and wouldnt relly serve any purpose. then i noticed it didnt work when i touched it with some object (conducting and not) and that really proves that it isnt a current, but also shows that it could be by heat. now i know that heat spreads itself out evenly on metal objects, so i was thinking that if you touch any metal part of it, you would heat it up a little, and thus if you have a heat sensor somewhere in the lamp it could turn on. only problem is the light bulb gets hot and invariable would turn on (or actually off) the lamp were it built that way. anyone actually know why/how they work?