If my mother had really cared that my sex was clearly discernable by strangers, she would have stuck a ribbon on my head, or made a frilly headband out of lace-covered elastic. Bad Mommy!
Today's little girls are so lucky! Not only do they have entire pink, girlie wardrobes and high heels just for them, but now they don't have to suffer the indignity of baldness.
Because everyone knows that REAL girls have long hair.
(The pink tutu isn't a big enough hint?)