It's genetics.........
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Well.... you do raise a valid point. A lot of black people have a voice that's genetically like that though... it's a part of their vocal chords but I'll give you that one.
However for growing facial hair it's well known that testosterone plays a big part in it. Reading here it says it's the ONLY known way to reliably increase facial hair.
As for voice... it apparently works for that as well.
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