'The visceral experience of personally killing the bugs was the most appealing choice for sadists.'The experiment controlled for "irrelevant phobias," which means they looked at whether or not people were crazy afraid of bugs—indicating that perhaps the bug killers really did just enjoy killing something. The researchers suggest that sadism is perhaps more common than we normally think of it. Sure, there's crazy serial killer variety sadism, but it also might manifest itself more commonly in everyday life. Like, perhaps, on the internet.