To be honest, Song Xiaodong was extremely cautious. He wasn't just thinking with his hormones, risking his life for such a thing.
As a doctor, as a master, he was indeed intensely interested in the peculiar True Qi within Su Yiyi.
He wanted to study the True Qi in Su Yiyi's body. He wanted to understand what this True Qi was, how it was produced. There was even a subconscious thought that if he could comprehend the principles behind its production, his own ability would greatly improve.
Song Xiaodong was careful, and Su Yiyi looked ready to flee at any moment. She wasn't afraid of pain or of this method, and as a woman akin to a vixen spirit, she seemed never to refuse things that men liked, as if it was instinctual. Even if she had never experienced it before, she was adept like a woman married for years.
When they truly made intimate contact, Song Xiaodong instantly felt an absorption force coming from Su Yiyi's body.