There is the sutta where Buddha mentions that the one teaching needs to be lustless or celibate or else he will have mixed feeling.
May I add this, please read rest in sutta, which I find important is the insights the teacher got already.
Lohicca, there are three kinds of teachers in the world who deserve to be reprimanded. When someone reprimands such teachers, the reprimand is true, substantive, legitimate, and blameless. What three?
Firstly, take a teacher who has not reached the goal of the ascetic life for which they went forth from the lay life to homelessness. They teach their disciples: ‘This is for your welfare. This is for your happiness.’ But their disciples don’t want to listen. They don’t pay attention or apply their minds to understand. They proceed having turned away from the teacher’s instruction. That teacher deserves to be reprimanded: ‘Venerable, you haven’t reached the goal of the ascetic life; and when you teach disciples they proceed having turned away from the teacher’s instruction. It’s like a man who makes advances on a woman though she pulls away, or embraces her though she turns her back. That’s the consequence of such a wicked, greedy deed, I say. For what can one do for another?’ This is the first kind of teacher who deserves to be reprimanded.
That can happen but then…
Furthermore, take a teacher who has reached the goal of the ascetic life for which they went forth from the lay life to homelessness. They teach their disciples: ‘This is for your welfare. This is for your happiness.’ But their disciples don’t want to listen. They don’t pay attention or apply their minds to understand. They proceed having turned away from the teacher’s instruction. That teacher deserves to be reprimanded: ‘Venerable, you have reached the goal of the ascetic life; yet when you teach disciples they proceed having turned away from the teacher’s instruction. Suppose someone cut off an old bond, only to create another new bond. That’s the consequence of such a wicked, greedy deed, I say. For what can one person do for another?’ This is the third kind of teacher who deserves to be reprimanded.
that means it takes skill in many things
I believe your own Vibe I call it.
I can listen Australian monks the whole Dhamma talk but others for me, I tend to look for another video. Or it can be if the Dhamma talk has meaning etc
So accent. Playfulness. Articulation. Tone. Sound
Alot more factors influence. Your own self-esteem. Etc People feel if its low etc