Why is a smile important?

Related questions

1. Is smile good for health?
2. Is it bad to smile a lot?
3. What is a genuine smile?
4. What is flirtatious banter?
5. What do you call a fake smile?
6. What happens when smile?
7. What is the rarest eye color?
8. Who is the beautiful lady of India?
9. What is the saying about smiling?
10. What a beautiful smile you have?

Tags

1. #physically
2. #smiling
3. #system
4. #improve
5. #easier
6. #muscles
7. #immune
8. #contagious
9. #immediately
10. #smiles
11. #boosts
12. #whole
13. #frown
14. #relaxes
15. #smile
16. #because