What is a genuine smile?

Related questions

1. Is smile good for health?
2. Should I tell a girl she's pretty?
3. What is the benefit of smiling?
4. Why do I smile?
5. What is the saying about smiling?
6. Is it bad to smile a lot?
7. What do you call a fake smile?
8. How do you say pretty girl in Spanish slang?
9. What a beautiful smile you have?
10. What happens when smile?

Tags

1. #muscles
2. #after
3. #smile
4. #those
5. #corners
6. #which
7. #spontaneous
8. #mouth
9. #involves
10. #beyond
11. #outer
12. #neurologist
13. #genuine
14. #identified
15. #guillaume
16. #duchenne
17. #called
18. #crinkling
19. #instance