I don't think hair-color has anything specific to do with anything, but you have to look at the genetic traits of those women who commonly had red hair, where they came from and what traits were prized, & therefore passed on as dominant.
I, for one, likes me on hot tempered, tough, Viking/Celtic bitch who can take it and give it back in kind while laughing about it the whole time... later she screws you... not the other way around.
But, that is just me... don't listen to me... I'm a freak.
Celtic Worrior Women... can't read... must. Not. Get. Hot.
