Spanking machines

There's something kind of interesting about the idea of a machine capable of delivering a spanking, caning, or whipping with a complete lack of emotion.  Every stroke delivered with the same required force and great accuracy.  Unfortunately, most that have been produced in recent times seem rather too flimsy with the notable exception of the one used by the guys at Spanking Server/Pain4Fem.  But, there's no doubt that some people find the idea fascinating and keep on trying.

I was intrigued by this one I found on the web recently.  An ingenious mechanism to draw the cane back and then release it.

But no sooner had I found that, than I came across an even more intriguing clip, because the suggestion is that this is an historical item that was actually used in a school for the pupils to quite literally spank themselves.