Sometimes I encounter in online or in-person Chinese classes, students who comment on their teachers appearance. Typically it's a female teacher, and the student will say something like 她很美丽 or 她很漂亮 (both meaning "she's beautiful"). In a recent Reddit post, a student described their teacher as
她很美,也不老。
She's beautiful, and not old.
If I were the teacher, I would feel very uncomfortable getting such comments. My mind would be filled with questions: Are they flirting with me? What other professional boundaries are they going to ignore? Am I going to get in trouble for this? Am I inadvertently sending signals that my appearance is somehow on-topic? Should I somehow dress or behave differently? I spent years training to be a teacher, why is how I look relevant? I'd want this moment to end as soon as possible.
So...
Question: Is there research into language teachers getting comments from students on their appearance?
In particular I'm wondering if there's research such as a survey of how teachers feel about such comments, why students make such comments, and how commonly such comments are actually made.
I couldn't imagine a student calling, say, their chemistry teacher "beautiful and not old" and thinking that's normal behavior. I'm guessing these comments occur more frequently in language learning partly because the students only know a handful of adjectives, and didn't think to say "...is a good teacher" or "...is very helpful".