Why do some parents boost about giving their child ''a good spanking, whooping''?

I've heard of some parents even bragging about it, feeling great about that. Good to whom? Obviously to the one applying it but not to the receiver. The receiver definitely isn't going to feel good about it at all.

Bragging about something that makes the child cry in pain or scared sounds selfish to me. It's all about you and how you feel, your feelings, you... you, not them.

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If you're going to do it, at least don't brag about it. Not only is it lacking compassion but you're actually enjoying it. I find that weird.
Why do some parents boost about giving their child ''a good spanking, whooping''?
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