what does Roger`s treatment of the pig reveal about his personality

Roger is one of the more masochistic boys on the island. As time progresses the thin line between savagery and civilization disappears quickly for Roger. Roger loves to inflict pain in a much more brutal way than Jack. The killing of the sow is much more graphic than any other killing of a pig. Golding uses disturbing rape imagery to describe Roger's overpowering and torture of the animal, "He slowly drives his spear into the anus of the sow, torturing it more than killing it" Roger is discovering a twisted ecstasy of torturing for pleasure. He is perhaps the most disturbing boy in the story.