I got a few as Elementary School but don't remember what lead to any of them.
I have recently seen studies linking it to aggression, emotional issues later in life and strained parental relations.
I haven't had a very high opinion of my mom and have recently realized that said spankings were the foundation of it.
I can think of several parents here that I wish I could drill the results of these studies into their heads and be like "look at what you are setting your children up for"
I stopped when they were 10. If they dont know the rules and what will happen by then, spanking isn't going to help anymore.
However they are 22 and 24 now and I STILL feel the urge to smack them upside the head sometimes.