Why do some religions require men to have beards and women to never cut their hair?

What religion is that? It certianly not christianity..

This could be about Sikhs,because as far as I know, they do not cut their hair/beard ever(at least those who adhere to the strict rules).

I do not know about the beard requirement in some faiths, but I do know that some Pentecostal relgions (and others) believe that the woman should have long hair, as that is her "covering." I Cor. 11:15. You can read the various Bible translations for this verse and explanations - 1 Corinthians 11:15 But if a woman has long hair, it is a (http://bible.cc/1_corinthians/11-15.htm)