I think it's Ti that does that (you don't see it with NFPs so much, while you do with STPs)... and much of the time, because it is done quite bare-handed so to speak, it's almost done in the name of Fe, but without really using Fe's velvet gloves. even when it is done with care, the process still has some conflicts with other types:
for TJs, while they often experience the same need as TPs to "figure wtf are they feeling" and are thus less likely to resent it, they often experience a sense of disorientation in the way TPs do it. that is because they are trying to see what point your getting at, and there you are changing your direction every other question, because what you really are doing is exploring possible points in a spiral, a process that - especially to the non MBTI aware - often won't make sense to them until you've finally found the treasure, and even then they'll often be, "how the f' did we get here?".
with FPs, the Ti questioning is often going into extremely private territory for them, they experience some of the same Te disorientation as above, but for the most part, they don't feel you have any right to dig in those areas, in fact while some people might get the restricted tourist visa, the only person who really does have a right to do so - as far as they are concerned - is themselves.
with FJs, mainly the less developed and unhealthy ones, you are breaking into a world of appearances, it doesn't matter if what you are saying makes sense, the thought's credibility as well as your own will depend on whether it puts them in a positive or negative light. if what you are saying end's up being an unpleasant truth, the act of saying it is the real crime. healthier FJs will rise above it, and are even able to do some Ti questioning of their own.