The eye is so useful that it evolved multiple times, so perhaps blondes just more fun that blond hair also evolved more:
That's my theory and I'm sticking by it. Well, at least the second part is true. Science has just solved the mystery of why many Solomon Islanders have blonde afros:
Pay a visit to Melanesia's Solomon Islands, 1800 kilometers northeast of Australia, and you'll notice a striking contrast: about 10% of the dark-skinned islanders sport bright blond afros. Hypotheses about the origins of this golden hair have included bleaching by sun and saltwater, a diet rich in fish, and the genetic legacy of Europeans or Americans. But a new study fingers a random mutation instead, suggesting that blond hair evolved independently at least twice in human history.
Link (Photo: Sean Myles)