Smile and Make Smiles Happen

I was walking to university this morning when I saw a man smiling. The thought that he was smiling for no reason rubbed off his smile on me, then I was smiling - I looked back and realized he was smiling because he he had seen his partner in the distant behind me. That didn't change the fact that his smile had already rubbed off on me and I continued walking and smiling. The I realized the same phenomenon had happened to be a few years back when I saw a friend in the distant and smiled, and noticed strangers walking past were smiling at my smile. This phenomenon is mood contagion - it happens with negative moods, feelings and behaviors too. Lets use its positive effects. Lets smile today and make others smile too! You feel good, so will others, and its contagious !!! Challenge: Can you have all your colleagues smiling by the end of today? :)