Why do jeans have buttons?

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Tags

1. #appeal
2. #puritans
3. #button
4. #original
5. #widespread
6. #created
7. #recent
8. #roots
9. #jeans
10. #added
11. #classic
12. #customers
13. #until
14. #traces
15. #vintage
16. #years
17. #hoping
18. #zipper
19. #female
20. #denim
21. #gained