I don't recall a single time in my childhood being spanked actually helped in any way, actually I remember a number of times and to this day I still think it was unfair.

That being said I remember being maybe 6 or 7 and having an instance where another child was unwilling to share several communal toys that I wanted to play with too, I would generally share so it seemed reasonable that she would too but she insisted these were for her. So I took one, she cried, fussed and I walked away triumphantly until my mom called me over and snatched it out of my hands. Then I cried, I felt betrayed by her because she was supposed to be on my side. She asked 'how does that feel' I explained and she responded 'that's what you just made her feel like' and I guess a light bulb went off, I -got- it, gave it back and apologized. But I guess the point of my story is -that- one, that's the story that I remember and benefit from today; not the spanking stuff. If anything I still think I was in the right about the other stuff. hah.