Have you ever watched a program on television, read a book, or had a conversation with someone when suddenly a certain topic comes up in one way or another that makes you want to back off or change the subject?
Perhaps something bad happened to you a long time ago that related to said topic and ever since then, you can't stand it because it brings back bad memories. Or maybe you lost someone dear to you and that topic reminds you of them.
Maybe it was something not as dramatic but still painful in someway even if you weren't physically hurt yourself but maybe emotionally.
For me it would be topic pertaining to religion. I have nothing against religion or any anger toward the concept of belief. I'm not religious myself but due to some issues I had 3 years ago (I used to be religious-ish but something sad happened but the internet is cruel so I keep it to myself) I've become a little iffy around discussions and try to avoid them without being a bother to anyone else.
AAAAAAAAAAAny way, are there any topics, ideas or concepts that, for whatever rational or irrational reason, you feel uncomfortable discussing? Doesn't have to be something super deep or dramatic.