I never realized that facial expressions could affect your mood. In the book they used a pen experiment and it showed that when the individual held the pen between their teeth, their mouth was serendipitously put into a smile so in return they found that when they looked at the cartoons they were amused versus when they held the pen with their lips, their mouth was put into a frown and they found the cartoons less amusing. I was always told a smile is contagious. If someone smiles at you, you smile back at them. For me it does put me in a better mood. I always try to be positive and have a smile on my face no matter what mood I am in. I feel that if I am positive and happy, I can make someone’s day a little better.