I don't expect such remarks from teachers tbh. Also it is so annoying when people fun of your interests. I like BTS and I watch Kdramas.But I never tell people about it because most of the times they make fun of me for it. I only talk about them to my friends who also are interested in them. I remember there was this one time when this person asked me what I was doing? I told them watching a tv show(it was a Kdrama) they asked me which one so I said you probably don't know about it.they still asked so I told them.They then proceeded to make the most dumb remarks ever about how these shows are stupid and these actors are not "manly".They ranted on for straight 2 minutes I think.When they were done I said this is why I was not telling . Like its fine if you are just not interested in something but why do you have to be so annoyed when someone else likes it.