�The reason why married women cover their hair�
�Do you know why the Halacha is that women must cover their hair?�
I will quote one of the previously great Gadolim who lived 250 years ago – The Rav of Mitz and was a Talmid muvhak of the Shages Aryeh (who was also previously Rav of Mitz):
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– ????? ??? ??? ?? ????, ?? ???? ???-
http://hebrewbooks.org/pdfpager.aspx?req=10108&st=&pgnum=392
As you cans see he clearly states that there is NO specific reason why it�s considered an Erveh:
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