Incidentally, this also suggests that the stereotype that blondes are dumb may have some statistical basis and is true (as virtually all stereotypes are true, as I explain in a previous series of posts:  I, II, III, IV, and V).  Why do people believe that blondes are dumb?  Recall that the human brain, including the stereotypes that it generates, is adapted to the ancestral environment (as the Savanna Principle suggests).  What would be the average age of light blondes in the ancestral environment (say, northern Europe 10,000 years ago) in the absence of hair dye?  Roughly 15.  What would be the average age of brunettes in the same environment?  Roughly 35.  A 15-year-old woman is bound to be more naïve and less experienced, mature, and wise (in other words, “dumb”) than a 35-year-old woman, no matter what her hair color.  It’s not that blonde women are dumber than brunette women; it’s that younger women are “dumber” (less knowledgeable, experienced and mature) than older women, and blonde hair is a reliable indicator of extreme youth.

The same logic is probably behind the stereotype that women with large breasts are dumb.  In the ancestral environment, without plastic surgery or even bras, only very young women had large, firm breasts.

Fascinating.