I think my interest in adilt spanking can be traced back to old movies. In many made from the early silent days through at least the 1960's there were several where firey heroine ended up otk for a spanking from the hero. Net result by end of movie? Romance in full bloom. Here are a few examples.
1001 Danish Delights
Casper's Weekend
Wagon Train
Thunder Mountain
Girl Shy
Don't Doubt Your Husband
That's a start more post as I get time.