Petting feels good. You can see it in a cat’s slowly closing eyes or the contented panting of a dog getting his belly rubbed. In fact, all mammals enjoy being caressed, including humans. Researchers looked at this phenomenon in lab mice and found that stroking stimulates a very specific set of neurons that have to do with hair.
read more: http://blogs.discovermagazine.com/80beats/?p=42682
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