If the questions are of a medical nature, and you feel sick because you are squeamish (you don't like talk about blood, etc.), you can say, "I'm squeamish. Is there any nicer way to tell me this?" Most doctors or nurses can and will. If the questions are social and sexual, and this makes you uncomfortable, do the following: 1. Lower your chin toward your chest a little, but keep your eyes to the person. 2. Keep a small smile. 3. Narrow your eyes, as if you are thinking of something serious. 4. Keep a low volume but a confident voice and say something witty: "Be a gentleman; I'm sure you're capable." "Do you speak to your mother this way?" "Let's see if we can be civilized, shall we?" Or, you could use some advanced vocabulary here: "Don't be such a troglodyte." "You seem to be libidinous, so I'll excuse myself." This usually causes the rude person to feel "put in his place" (chagrined) without your having to be rude yourself. If the situation is other than these two, let us know.

Excuse me, I need to go (then walk away)

Wow! I am squeamish! I even don't have a corresponding word in russian but in english it's present. Russians should invent some term for this....

conversation is made of questions in a percentage at least, specially if people don't know each other well. if not what you are having is a lecture, a conference or a speech, or something that is not at the same level between speakers. so, if you don't like questions to be made to you, that shows that your social abilities are very low or that you are a very proud person. in whatever case, abandon social networks and good luck.

In a polite way, tell him/her that you couldn't answer the questions anymore.