"Psychopathy? There's some evidence to suggest that... maybe there's a genetic component. It's... inconclusive, because the link could be related to nurture more than nature... it's a whole debate, academically." His jaw tensed slightly and he looked down. "The inconclusivity of the studies didn't stop kids at school from calling me 'psycho'. I've been watching myself for signs of it since I was eleven years old."