What is natural euphoria?

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Tags

1. #something
2. #brain
3. #natural
4. #healthy
5. #abuse
6. #euphoria
7. #chemistry
8. #euphoric
9. #produce
10. #these
11. #exciting
12. #drugs
13. #elation
14. #being
15. #feeling
16. #taking
17. #happening
18. #manipulating
19. #feelings
20. #artificially