On second thought.. I'm all for promoting harmony, however, the social niceties that go along with all of that--I have a difficult time with...
All of these social customs and whatnot! Inappropriate things that should be left unsaid, white lies that should be told: I fumble all over these rules, and as a result, FAIL at making that sparkling first impression every time.
If you ask me if your ass looks fat or if your haircut looks stupid, chances are that if your ass looks fat and your haircut looks stupid, I'm going to tell you in the most diplomatic way I possibly can, and then be utterly baffled when you are offended.
So maybe if a person is quiet, and awkward, and says all the wrong things upon being acquainted with you--they are an INFP as well?