What does testosterone do to a man?

Related questions

1. How do you check testosterone levels?
2. What happens when a man's testosterone is low?
3. Are testosterone pills legal?
4. Does injecting testosterone make you bigger?
5. Can testosterone increase size?
6. How can I check my testosterone levels?
7. Does sleep affect testosterone?
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Tags

1. #roles
2. #testosterone
3. #converted
4. #plays
5. #strength
6. #amount
7. #small
8. #regulate
9. #important
10. #drive
11. #sperm
12. #muscle
13. #blood
14. #estrogen
15. #distribution
16. #thought
17. #production
18. #libido
19. #cells
20. #hormone
21. #circulating
22. #estradiol