Half-men are genetically engineered organisms created to serve as bodyguards and soldiers for countries and rich corporations. The general combination is the DNA of a human, combined with that of a mammal, usually a canine or large cat. Poor women often sell their eggs to places that create Half-Men. Half-men are tortured and abused from birth so that when a buyer acquires them, they feel an overpowering sense of loyalty for their perceived savior. This loyalty goes so far that in most cases a Half-man will die or go insane when their owner dies or leaves. The only known exception to this is Tool.