Auto-translated
He reproached the person for emotional instability and spiritual imperfection, which at least brought him a fleeting smile as he read the supposedly malicious response.
What's your problem? Do you want to forbid people from doing what they want?
Do you think it was so important for him to "express his unemotional opinion"? If so, he would have ignored it altogether and not written anything there. You are playing a game of figuring out who is perverse and with whom they are having sex, while he is playing a game of harmlessly teasing someone. Essentially, it's the same thing. You're overthinking it.