A vividly felt aversion to contamination, impurity, and poison, or to parasites and other signs of disease. Disgust has a typical facial expression of oral or nasal displeasure, that is difficult to suppress and that facilitates the quick communication of the aversion. The adaptive advantages of such quick signalling is evident, but disgust can also be recruited for moral and political purposes. For example, it can add force to social and moral exclusion: if a person or a class of people are found disgusting ordinary human interactions can become suspended. The same typical facial expression can be elicited by moral transgressions that also cause resentment and dislike. God’s reaction to our sinful natures is often supposed to be disgust, and the appropriate response may be to hide ourselves in shame, or to go in for rituals of purification. See also humiliation.