I know we don't have many on this board, which is unfortunate, but I have a question and this is the only place I think I might get an answer.
In my personal experience, every time I've asked an extravert (of genuine curiosity mind you!) why they applied intonation they way the did, used the phraseology they used, or made the facial expression they made, they become noticeably uncomfortable, if not confrontational.
This doesn't cut down N or S lines, either; when I've asked my ISXX and INXX friends the same nature of question, they have always taken a moment or so to contemplate and given me an honest response, even if it was "I don't really know". Conversely, regardless of N or S, my extravert friends all act as I described above.
What's the deal with that???
I use italics and multiple question marks because I am genuinely mystified.