"[We] administered testosterone to men; instead of sharing money, they become selfish. Interestingly, high testosterone males are also more likely to use their own money to punish others for being selfish."

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Everybody makes such a big deal today about team play because there's such a scarcity of it. Greed is a reason. You have to understand the influence of greed. A player has to be selfish in the pursuit of the development of his skills, but he cannot be selfish when it comes time to blend them in with what's good for his team.

— Pete Carril