Why are nipples darker than the rest of the skin?

It all comes down to puberty and hormones

8 ways your nipples can change when you breastfeed - Today's Parent

The 7 things that make your nipples DARKER - and when it could be

Nipple Vasospasms and Exclusively Pumping - Exclusive Pumping

Dark nipples: 7 causes and when to see a doctor

Breast Changes in Early Pregnancy: What to Expect

Dark nipples: 7 causes and when to see a doctor

Nipple Dermatitis Symptoms & Treatment - Skinsight

Are My Areolas Too Big? Detailed Explanation of All the Possible

研究发现：42%的女生每周自慰超过一次。今天聊聊女性的“自慰自由” - 日记- 豆瓣

How Areola Size Affects Breastfeeding

What Causes Your Nipples To Change Color?