Some questions can be swallowed or ignored or even you can refrain from answering them.
Embarrassing, humiliating, difficult questions vary according to the person we are addressing or asking. To some people, it does not work that way and they can easily get rid of them. For instance, if you ask someone about his/her monthly salary, he or she might not feel anything about it. The answer can come casually or without any interest. Some questions are hard to cope with or deal with. Let's say that someone asks about your wife's favorite perfume. The answer to that might become a big fuss, and develops into a fight. So, what is that question that puts you in a hole, or you become perplexed?