If someone compiled a list of things people would prefer never to talk about, somewhere near the top would be human excrement. It is, to say the least, hardly a topic of public conversation.
Unfortunately, our nose-wrinkling aversion to toilet talk can hinder what in fact are important discussions about sanitation. (…)
Because taboos have always surrounded human excretion, when it gets talked about all it is usually under the cover of euphemisms. Even health organizations don’t like talking (in the kind of detail that is necessary) about these issues. “Public health professionals talk about water-related diseases, but that is a euphemism for the truth,” writes Ms. George. “These are shit-related diseases.” (…)
Rose George: The Big Necessity: The Unmentionable World of Human Waste and Why it Matters
One Smart Book About Number Two at Newsweek