为什么人接吻的时候会闭上眼？
<p><span word="The">The</span> <span word="real">real</span> <span word="reason">reason</span> <span word="people">people</span> <span word="close">close</span> <span word="their">their</span> <span word="eyes">eyes</span> <span word="when">when</span> <span word="they">they</span> <span word="kiss">kiss</span> <span word="is">is</span> <span word="because">because</span> <span word="the">the</span> <span word="brain">brain</span> <span word="can">can</span>'<span word="t">t</span> <span word="deal">deal</span> <span word="with">with</span> <span word="more">more</span> <span word="than">than</span> <span word="two">two</span> <span word="things">things</span> <span word="at">at</span> <span word="once">once</span>.</p><p>人们接吻时闭上眼睛真正的原因是大脑不能同时处理两件以上事情。</p><p><span word="When">When</span> <span word="people">people</span> <span word="pucker">pucker</span> <span word="up">up</span> <span word="the">the</span> <span word="brain">brain</span> <span word="finds">finds</span> <span word="it">it</span> <span word="difficult">difficult</span> <span word="to">to</span> <span word="process">process</span> <span word="the">the</span> <span word="sensation">sensation</span> <span word="if">if</span> <span word="cognitive">cognitive</span> <span word="power">power</span> <span word="is">is</span> <span word="also">also</span> <span word="being">being</span> <span word="used">used</span> <span word="to">to</span> <span word="analyse">analyse</span> <span word="what">what</span> <span word="we">we</span> <span word="see">see</span>, <span word="said">said</span> <span word="psychologists">psychologists</span> <span word="from">from</span> <span word="Royal">Royal</span> <span word="Holloway">Holloway</span>, <span word="University">University</span> <span word="of">of</span> <span word="London">London</span>.</p><p>人们嘟起嘴时，如果也一并用到认知力，则大脑很难处理感觉知觉，伦敦大学皇家霍洛威学院的心理学家如是说。</p>
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