来自《耶鲁大学开放课程：心理学导论 第17集 第17集》

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  touching parts of the body in a mock attack.
  触摸身体的部位做出假装攻击
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  You sort of attack somebody and they're laughing
  你假装攻击某人 然后他笑了
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  but if it's--but if somebody's trying to mug you
  但如果某人正试图对你行凶抢劫
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  you're not "Ah, this is so funny."
  你就不会觉得"这真是有趣"
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  You have to realize that this is a mock attack; you're simulating attack.
  你必须了解这是假的攻击 你只是模仿攻击
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  So one theory is--is a signal of mock aggression and collective aggression.
  所以这理论说 笑是一种假装攻击和集体攻击的信号
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  It's basically--it's like a sound of some sort of mob attack.
  就像是某种暴徒攻击的声音
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  It's mock aggression in the sense that
  某种意义上说假装攻击
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  when people laugh they're often teasing, kidding around.
  戏弄挑逗他人时会笑
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  They're throwing out insults, maybe they're tickling each other,
  他们会侮辱他人 也许是相互逗乐
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  maybe they're making fun of each other, maybe they're making fun of themselves,
  也许是相互取笑 也许是取笑自己
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  and there's some aggression to it.
  都有某种攻击性在里面