This article was posetd to CNN yesterday concerning Redhead's low pain tolerance and how we're often unaffected by anesthetics... sometimes requiring as much as a 20% dosage increase to be affective! Crazy interesting. I don't think I'm one of those affected, but it gives me a good excuse to dislike dentist trips.
http://www.cnn.com/2009/HEALTH/07/30/redhead.pain.dentist/index.html...
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