MANHOOD MYSTERIES: Q: Why do guys grow facial hair?
A: One word: testosterone.
All people have testosterone in their bodies, guys just have a lot more of it.
It's an important chemical that fluctuates throughout your menstrual cycle.
Guys may not have a period (lucky!) but their testosterone plays an important role in creating sperm.
It's also what causes that beard to grow.
The real question here is: bearded or clean-shaven? What’s your choice?
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