At the same time your average human population that lives South of the 30th has an hereditary fish allergy 48% of the time.
Still, the amount of vitamin D you are going to get is less than you will need. It pays to have translucent skin, even if it tans in the Summer.
Yes. But back to the original thesis of the article ... I suspect the caveman preferred the blond because she was healthy and didn't have rickets, rather than that she was sexy because she was a blue-eyed blond.