为什么拉稀的时候放屁不会出来屎，人体（主要是肛门）是靠什么分辨屎和屁的？ (opens in new tab)

<div class="main-wrap content-wrap"> <div class="headline"> <div class="img-place-holder"></div> </div> <div class="content-inner"> <div class="question"> <h2 class="question-title"></h2> <div class="answer"> <div class="meta"> <img class="avatar" src=" referrerpolicy="no-referrer"> <span class="author">祥昊，</span><span class="bio">111</span> <a href=" class="originUrl" hidden="">查看知乎原文</a> </div> <div class="content"> <p>行了，别瞎琢磨了，</p> <p>窜稀时放屁崩不出屎纯粹是因为这时直肠里没水货。</p> <p>但凡有点稀汤带水的这问题...