twisted8:
For me it was reading Heinlein's 'Glory Road' at age fourteen. There is a short section where the two main characters, Oscar & Star, indulge in a little connubial spanking scene using the flat side of Oscar's sword.
I remember this story. It was the first story I read that was meant for an adult audience that had spanking in it. I remember reading the first bit of it in the book store and there was a part where he threatens to spank her with her own sword. I bought the book in hopes that he would.
-LK