This document discusses taboo and euphemism. It defines taboo as things people do not talk about due to being harmful, immoral or improper. Euphemisms are ways of talking about taboo topics indirectly. Common taboo topics include sex, death, and bodily functions. Euphemisms are used to soften or avoid direct language, to be polite, or sometimes impolitely. The document provides examples of taboo topics and euphemisms from different cultures and languages.