But lest you think this is just some part of the Christian imagination where Christians have this weird problem with pleasure, here's the same story, the same progression, told in a paper that was published in "Nature" a few years ago, in which Ernst Fehr and Simon Gächter had people play a commons dilemma, a game in which you give people money, and then, on each round of the game, they can put money into a common pot, then the experimenter doubles what's there, and then it's all divided among the players.