The definition's not perfect, but it does fit pretty close when it comes to describing the mind-set of torturers, terrorists and tyrants.
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But it also describes the frenetic compulsion of adults who feel "Responsible Parenting" first and foremost means grabbing a belt whenever they feel like it, and spanking the asphalt outta their kids.
Oh sure, getting spanked hurt back when they were kids, but "spanking done did me good!"
When a little person gets angry or frustrated about not having his way, he still needs that lesson, the infliction of pain, to get re-focused and be reminded who's in charge.
I mean that, what I'm saying is, the little person is the parent who entitles himself to start spanking.