I am white British, family all.white British, from England. I have blond hair and blue eyes. I do have some African blood though, many generations back, I don't feel African in any way though, never even been there, and feel no particular connection to the continent. I love my African heritage though, just because it's interesting.
If I had a black husband, black children lived among a black community and this was were I felt most comfortable, why couldn't I describe myself as black? Actually I think know why, I just don't understand why changing sex (or rather gender) is treated so differently, when sex, unlike race, really is binary. Not wanting to offend anyone and apologies if I haven't used the corrected terms. I really am curious though.