Yes, it does sound like a silly theory but in Victorian times, little boys wore dresses and long hair until they were 4 or 5 and then they went through a ceremony called "breeching" when their hair was cut shorter and they were put in little britches and shirts.
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Break out you Western girls,
Someday soon you're gonna rule the world.
Break out you Western girls,
Hold your heads up high.
"Western Girls" - Dragon