Unlike Winston, [Julia] had grasped the inner meaning of the Party's sexual puritanism. It was not merely that the sex instinct created a world of its own which was outside the Party's control and which therefore had to be destroyed if possible. What was more important was that sexual privation induced hysteria, which was desirable because it could be transformed into war-fever and leader-worship. The way she put it was:
"When you make love you're using up energy; and afterwards you feel happy and don't give a damn for anything. They can't bear for you to feel like that. They want you to be bursting with energy all the time. All this marching up and down and cheering and waving flags is simply sex gone sour. If you're happy inside yourself, why should you get excited about Big Brother and the Three-Year Plans and the Two Minutes Hate and all the rest of their bloody rot?"
That was very true, he thought...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?