People find punishing others gratifying August 26 2004 at 08:06PM Washington - A new brain study suggests that humans get satisfaction from teaching a lesson to people who have behaved badly. The study may at least partly explain why humans reprimand people who have abused trust or broken other social rules - even if doing so doesn't offer any direct, practical benefits, the journal Science is to report in its Friday edition. Swiss scientist Dominique de Quervain and colleagues scanned brain activity of male volunteers playing a game during which they exchanged money back and forth. Players could penalise another...