HOW SMILING IS CONTAGIOUS

Here is a video in which David Hamilton PhD explains why smiling is contagious.

http://spiritlibrary.com/videos/david-r-hamilton-explains-how-smiling-is-contagious

And here's a nice one to make you feel good.

PS  If you happen to recognise yourself, I hope you will enjoy being shown illustrating the power of smiles.  Please let me know if you would like me to take it down, and I will sadly do so!