Smiling Makes Others Smile, too

Smiling is contagious, so when you light up the room with your own, other people tend to read into your emotions as well with a similar feeling of happiness and joy. Due to mirror neurons that fire in the brain, humans are able to mimic the actions of others, like smiling, which has the ability to produce happiness. And for more ways happiness affects your body, Here's What Happens to Your Body When You Laugh.