My personal take on this, since info is limited, is that the inability to get an erection or release from normal intercourse is itself so frustrating that the only way these guys can get release is by their outrageous acts; most of the damage they do is by the use of instruments, the emotional trauma to their victims and the eventual resort to battering.
1662, name of a cowardly braggart (supposed by some to represent a Spanish don) in traditional Italian comedy, from It. Scaramuccia, lit. "skirmish," from schermire "to fence," from a Gmc. source (cf. O.H.G. skirmen "defend"); see skirmish. A vogue word in late 17c. London due to the popularity of Tiberio Fiurelli in the part (his company of It. players arrived in London 1673).
Yeah, and, in other news: the three remaining bargainers of an original six member sheep's union with the renegade wolf is in its 4th day of negotiations, no settlement in sight.
I heard a joke once where a farmer reputedly told a city slicker that he should have seen his land when God had it all to Himself; what this ideologue suggests is likely worse.