I walked into our local coffee shop today and was greeted by a friendly and smiling barista as he took my order. My returned smile remained on my face as I turned to walk up to the counter to wait for my drink, which was seen by a woman already there waiting for her drink. She smiled back. That was a moment of feeling accepted,spreading my happiness, and receiving it back. Smiling is truly contagious, as the mirror neurons deep inside our brains respond to a smile with a smil