After puberty the skin on my penis got a lot darker. I’ve noticed a few other guys with darker penises. Why?

Thanks for your question. During puberty hormones cause lots of changes in your body. Some of these changes include increasing the size of your penis, testicles, and scrotum. These hormones can also affect certain skin cells called melanocytes. These cells help give skin your color. Hormone changes during puberty can make the skin on your penis and scrotum darker.