Harvard University's Wo-ben Lee has said that most people know more about the moon tens of thousands of kilometers away than they do about the parts of their body just centimeters from their navels.
心事誰人知？﹘﹘專家談性知識美國哈佛大學李烏本博士曾說：「多數人對遠在卅八萬二千九百公里以外的月球表面上的情形暸若指掌，對近在肚臍下十幾公分的部分卻知道得不多。」