A new study found smiles are as contagious as laughter, and spread to an average of three other people.Here are a few more quick stats on how it can brighten someone's day:
1. 75% of people say a nice smile from someone can lift their spirits.
2. 36% say it makes them want to do something nice for someone else.
3. 64% say a smile from a stranger is as good as getting three compliments.
4. Smiles also make us want to be nicer to folks we just met. The people we're most likely to pass the positivity onto are friends, family, and strangers are third.