The pain of a Roman crucifixion caused the victim to oscillate between hanging from the spikes in their arms to standing on the spike in their feet. From a short distance away, this would appear to be a little dance, up and down, without end, and infinitely dreadful. In other sense, you can say that a slave is literally being fucked by a big wooden dick for everyone to see. And worse of all, it’s their own strong leg muscles that do that fucking.
