That point on night soil makes a lot of sense. Note that point about thick-skinned fruits and vegetables being seen as safe, in the grandparent post.<p>I&#x27;m also reminded of how the Chinese traditionally regarded cold drinks as dangerous. They didn&#x27;t even drink wine without heating it -- and certainly would never drink cold water, or tea that had been steeped without being brought to a boil (and, I think, held there).