There’s an elite all-girls prep school in my neighborhood.
And, yes, the uniform of this illustrious institution includes a plaid skirt.

One recent morning at the coffee shop, I espied one of the students in her uniform – short plaid skirt, crisp white blouse, tight blue blazer emblazoned with the school seal. Her long blonde hair cascaded down the back of her blazer. A pair of tanned legs protruded from her skirt.
She surely was aware of her own ripeness.
If I felt such ripe excitement it was surely because my body was already ripe for it….I would toss and turn in my bed, calling for a man’s body to be pressed against my own, for a man’s hand to stroke my flesh.
Simone de Beauvoir, Memoirs of a Dutiful Daughter