Why don't all men grow beards?

Why don't all men grow beards?

There is a type of sex hormones
masculine calls:


Part of their job is to stimulate
development of sexual characteristics
secondary as: body mass,
deep voice, clear facial hair.

The androgen responsible for hair
facial is called DHT and although everyone
produce, not all have the same
number of receptors in the skin.

Few recipients = 3 hairs

many receivers =

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