So strange, at work I am always getting cut and scraped it seems. Recently I had a gash on my arm and I refused to let myself pick at it. That scab stayed on there, and it took FOREVER to heal. I think that Charles Darwin has left us with an instinct to pick at scabs for a reason? After a lifetime of hearing parents say, "DON'T PICK AT THAT", I think we might have the wrong idea about scabs.