<em>Euphemisms</em> are words that "sound good" in the sense that they are neither offensive nor unpleasant.
Thus, they are used to prevent the audience from evoking unpleasant images, at least in a direct way.
They are frequently used when you are talking about some subjects that involve certain parts of the body or of the excretory system.
But, some times they are misused to bend the real true: many speaches from populist or dictators are full of euphemisms, which are aimed to twist the reality.
