My dad spanked my mom once, according to her. I was a toddler, learning to walk. Mom let me go to walk on my own and I fell, just missing the corner of a coffee table. It freaked him out, he blamed her, and popped her on the ass in front of relatives. I don’t think she ever forgave him the insult. Much as I loved and idolized my dad, I agree this crossed the line. Although he didn’t hurt her, he definitely demeaned her and asserted his dominance over her. If such a thing happened to me, my man had best not fall asleep!