Hitting kids is a bad idea. Disciplining them is another story.
I'm very glad you never had to discipline your kids with a spanking.
I had one son that I guarantee you, would have been in prison for hurting or killing someone, because he had a rebel streak in him a mile long. It took several years of discipline to get him on the right road. Most of the discipline was at the end of a wooden paddle. Thank God, I trained him the right way, or you could have been his victim.
It just gives rise to violent, angry kids. Ask any professional dog trainer.
I'll raised six kids and not one of them ever acted like a dog. Bad comparison