Why is coffee so addicting?

Related questions

1. Does Schultz still own Starbucks?
2. How Starbucks got its name?
3. Is Starbucks addictive?
4. What religion is Starbucks owner?
5. Why does Starbucks coffee always taste burnt?
6. What coffee does McDonald's use?
7. Does Tata own Starbucks?
8. What is Indian Starbucks?
9. Is Peet's coffee better than Starbucks?
10. Why Starbucks is expensive?

Tags

1. #depending
2. #physical
3. #health
4. #dependence
5. #nervous
6. #regular
7. #drugs
8. #addictive
9. #central
10. #cause
11. #doesn
12. #truth
13. #stimulant
14. #caffeine
15. #economic
16. #social
17. #threaten
18. #system