You mean like, sometimes "tough love" is better? I can see that too. I mean, not everyone responds the same to... external stimuli, of different sorts. :)

I am a firm believer in corporal punishment, myself. Not for children, not for the elderly, exclusively for people who can't speak a human language. I don't hurt cats, for instance. But a cat knows what's right and what's wrong when in the former case you coo it, and in the latter hiss at it.

People and animals learn different.

Pain, shame, or instilling other negative emotions is sometimes the only way to communicate intentions clearly. Pain is a sort of lingua franca for most sentient things.