为什么人接吻的时候会闭上眼

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The real reason people close their eyes when they kiss is because the brain can't deal with more than two things at once.
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。
When people pucker up the brain finds it difficult to process the sensation if cognitive power is also being used to analyse what we see, said psychologists from Royal Holloway, University of London.
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。
Tactile awareness depends on the level of perceptual load in a concurrent visual task. The cognitive psychologists reached their conclusion without studying people actually kissing. Instead people were asked do visual tests while their response to something touching their hands was measured.
触觉觉知取决于同一时间发生的认知量水平。认知心理学家得出此结论并没有真正去研究实际接吻的人。而是给人们一边做视觉测试，一边测量有实物接触他们手部时他们的反应。