Why do couples kiss?

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Tags

1. #someone
2. #reported
3. #kissing
4. #relationships
5. #spending
6. #hormones
7. #frequently
8. #study
9. #feels
10. #attracted
11. #satisfaction
12. #couples
13. #euphoric
14. #happy
15. #kissed
16. #increased
17. #something
18. #giddy
19. #released
20. #relationship
21. #dopamine
22. #other