All right then. Protected, how? How exactly does one protect females from sexual contact with the Others?
You've said the community would seek to protect the females, especially if Neandertal rapists were a threat. How would a primitive community protect these women, other than by telling them they're grounded?
You mention in post 42 "women were usually not even passed from one tribe or clan to another," so it's not that.
My position is that there was not much of this kind of protection going on, before people even understood that sex results in babies, and before people acquired scruples about sexual activity.
Protecting the bloodlines or the patriline isn't a concern until people understand the mechanism of reproduction. Maybe not even then, in some cultures. And how long did it take people to understand that bees do it? Quite a while, and well into historical times. It isn't very obvious how women make babies; the ancient Greeks believed some very silly things about the male/female contributions.
But ok, say they protected the girls but not by keeping them close to home. So...how?