George Orwell said this quote

There was a direct intimate connection between chastity and political orthodoxy. For how could the fear, the hatred, and the lunatic credulity which the Party needed in its members be kept at the right pitch, except by bottling down some powerful instinct and using it as a driving force? The sex impulse was dangerous to the Party, and the Party had turned it to account. They had played a similar trick with the instinct of parenthood. The family could not actually be abolished, and, indeed, people were encouraged to be fond of their children, in almost the old-fashioned way