June 23, is the Feast Day of St. Audrey, 7th century Kentish protector of throat disorders. Many thought that chewing gum was a way of prevention against these disorders of the throat and the chin.
According to Margery Wilison in New Etiquette (1937):
...(chewing gum)...since it is offensive to most people, it should never be used in public. A foreigner seeing Americans chewing fum for the first time couldn't imagine what caused them to make those strange movements with their faces, and concluded that there was a general facial affliction over here. 'I thought it was a sickness of the face...'
We're such an evil people, so ill-mannered and chewing that gum in public! Oh how times have changed!