So then you advocate spankings only when the child is mature?No one is saying they are "stupid," or that they don't learn fast, just that they don't think at a mature level yet.
Doncha think that's a little too late to start?
BINGO!The fact that they learn fast is in fact the problem here. Hitting them to get them to stop doing a certain behavior is called negative reinforcement, and the baby will quickly learn that crying might get it hit.
The baby learns very quickly that they can't throw a fit when you take a toy away at bedtime, or when they refuse to eat their food and throw it on the floor, or when they yank on the dog's ears....
Get your mind out of the gutter - this debate is not about a baby crying, it's about their actions.He will not understand that he should only cry for the "right reason," he will only learn that crying might bring pain.