Sigmund Freud har hatt en drøm der hans kone Martha, moren og barnepiken veksler om å ta plassen. Hans syns ikke han kan publisere drømmen av hensyn til Martha.

Sigmund Freud skriver til sin venn Wilhelm Fliess i Berlin (her gjengitt i engelsk oversettelse -- originalen er på tysk):

"A rumor has it that we will be invested with the title of professor at the emporer's jubilee on December 2. I do not believe it, but had a delightful dream about it, which unfortunatley cannot be published because its background, its second meaning, shifts back and forth between my nurse [my mother] and my wife and one cannot really subject one's wife to public reproaches of this sort as a reward for all her labor and toil.

Quite generally, the best you know , and so on."