A dirty joke is not, of course, a serious attack on morality, but it is a sort of mental rebellion, a momentary wish that things were otherwise.
George OrwellAll that was required of them (i.e. the brain-washed masses) was a primitive patriotism which could be appealed to whenever it was necessary to make them accept longer working hours or shorter rations. And even when they became discontented, as they sometimes did, their discontent led nowhere, because, being without general ideas, they could only focus it on petty specific grievances. The larger evils invariably escaped their notice.
George Orwell