What happens when smile?

Related questions

1. Why is a smile important?
2. Why do I smile?
3. What do you call a fake smile?
4. What a beautiful smile you have?
5. How do you say pretty girl in Spanish slang?
6. How healthy is smiling?
7. What is flirtatious banter?
8. What is the rarest eye color?
9. Is it bad to smile a lot?
10. Is smile good for health?

Tags

1. #brain
2. #neurotransmitters
3. #including
4. #little
5. #happens
6. #blood
7. #endorphins
8. #flashes
9. #releases
10. #serotonin
11. #nervous
12. #lowering
13. #chemicals
14. #pressure
15. #smile
16. #calming
17. #across
18. #heart
19. #party
20. #these
21. #system
22. #dopamine