Preaching and giving lessons to solve doubts shows that he is good at being a teacher, feels very powerful and has super cognitive ability. In fact, he lacks self-confidence and someone to talk to. Perhaps, he may be extremely bored, or he may think that you are lacking in some aspects. He wants to improve your education.

Generally chatting, if you are not interested, you just change the subject. There are many topics between husband and wife, such as doing a good job at home, such as what to do.

You can gently stimulate him. Preaching is one thing, doing things is another. What you say is not as important as what you do, so you ask him how to do a good job. We'll talk when we're done.

If it is really lacking, you can consult something. If it is not, don't talk to him. No time, something to do, let him talk if you want.