Spock jerked his head away before she could touch his ear. It was an instinctual reaction, and after he had done it, he was embarrassed. Embarrassment. Another human emotion. He was falling apart. How could he be feeling this way? He was reacting, not thinking. He was behaving illogically. He was ashamed. And he was ashamed for feeling ashamed. Disappointed for feeling anything at all. It was similar to that time when he'd been infected by the seeds of that alien plant, causing him to indulge in his deepest desires and emotions. Only it was worse. Worse because these weren't emotions of love and happiness and joy. He was experiencing fear, frustration, pain, disgust. And numerous other disgruntling sensations.
He wanted to be a void again. He wanted to be in control.
When he turned to look at the woman, his face was distressed. He wanted to look apologetic, but he also wanted to look unmoved by her presence. The result was the expression of a man who was on the brink of losing himself.
"I ... apologize. But it is ... inappropriate for you to touch my ears unless we are engaging in the pon farr."
And he could only hope that the medications the doctors were giving him wouldn't ignite that flame of passion in his body. He wasn't sure he could withstand that urge in his current mental state.