This part is entirely about the sexual act. how does winston describe his encounter with a prole prostitute?

"Winston writes in his diary, revealing the details of a particularly sordid night when he had sex with a prole prostitute with a face thickly painted in makeup (which Party women never wear). Winston struggles with his internal turmoil surrounding this disdainful act, noting to himself that man's nervous system is his worst enemy. There is no way to fight involuntary facial spasms or talking in one's sleep. These are the actions that cannot be stopped, yet can condemn one to death."
-Grade Saver

The answer to that would be prussia which would later be germany