Can Smiling Make You Feel Happy?

For years, scientists have argued over whether the act of smiling can make a person feel happy. The facial feedback hypothesis says that part of the way we experience emotions is determined by what we're feeling in our bodies. So for example, if our heart is racing, it could amplify or make stronger the feeling of fear. In this case, if we're physically smiling with our mouths and cheeks and eyes, it could actually make us start to feel happier.