“Spread ‘Em!”
He’s told her to spread her bottom cheeks so that he can “whip in”. She’s… understandably reluctant:
From Der Flagellantismus in der photographie (Hippocrates Press, 1933).
See Also:
Spanking Blog: Adult Erotic Spanking At Its Best
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How It Started And How It's Going, The Movie:
Wild Party 2: Five Very Sorry Girls
"...thirty vicious cane strokes for each delinquent young woman caught drinking on school grounds..."
YEEOUUUUCH!!!