“During WWII, when women were employed in large numbers in war industries, notices devised by women were occasionally seen, testifying to the thoughtfulness with which they used their new-found privilege. A typical notice seen in an aircraft factory (by a reporter for the the Philadelphia Evening Bulletin, Sept 16th 1942), read: ‘No swearing. There may be gentlemen about.'”

Montagu, A., 1967. The anatomy of swearing, University of Pennsylvania Press. P87