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What men are attracted to pigtails?

At the risk of oversimplifying things, I think it is fair to say that men who like pigtails are men who like girls to be: young, uncomplicated, innocent, naive and cheerful. Since blond hair also seems to carry the suggestion of uncomplicated youthfullness, I would expect that pigtail lovers are more likely to prefer blondes than brunettes.
As far as sex is concerned, it would seem that these men like to take the initiative and let their pigtailed partners play a more passive, if not submissive, role.