Short, long, covered or curled?
It's no secret a woman's hair is her crowned jewel, as most orthodox religions will require their women to cover (or even shave) their locks before the presence of other men.
Why?
I'm thinking it's a jealousy-thing.
Perhaps they don't want other men looking at, or grabbing (like cave-men) their women.
Perhaps long flowing hair is a sign of health and beauty... of strength and virility in genes that a woman possesses, and that's a secret a man wants to keep all to himself and his concubine.