Quote:
Originally posted by Jeff
Maybe this a commonly known and I'm just stupid, but why does aluminum foil make me cry when I bite it? It really hurts.
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It's a galvanic reaction caused by metal (foil), metal (a silver filling), and water (saliva). Electrons are passed from the foil to a silver filling giving your tooth a little shock. Neat, huh?
The more important question is why you're chewing on aluminium foil...