||1. It seems that the requirement of head covering for a woman should not distinguis between married and single - based on the gemara in Ketubot 72. Why do you think this distinction was ever made?
2. If indeed some women's hair is not considered an ervah - women who are not yet married - then doesn't that imply that the sexual nature of hair is context based?
3. Why do people think that a woman's head covering is supposed to be a siman that she is married? Where would such a thought come from?
thank you for your time