I dont think it's quite that though.
It's not T vs F. It's about Fe-POLR, which is quite a phenomenon and easy to recognize. You can't really apply these statements to another T vs F pair (except maybe ILI vs IEI, can't really comment as well on that though).
Fe-POLR has a certain look to it, a certain way of holding the lips when serious, a furrow in the brow even when not angry, a certain way of displaying and communicating feelings (including a characteristic way of smiling). Also a very typical way of subdued reaction to another party displaying feelings.
Examples:
#1. I was watching Survivor on TV. SLI joins me on the couch. The episode was ending, with previews for next week, and they show an elephant appearing very close to the survivors' camp trudging through the forest gathering food. I thought it was really cute and so I squealed and giggled and looked over at SLI. SLI = stone faced, serious. So I was like, oh, I guess he didn't find it amusing. . .At which point, I went back to being serious. Then he asks me if I mind if he changes the channel so he can watch baseball.
#2. One of our patients in the hospital was initially very sick and out of it. I'd passed by the patient's room at one point to check on him, I was standing in the hallway, and the patient was feeling a lot better and was being a little goofy and waving to me from behind his table (like a peek-a-boo thing--which was humorous in that this was a 50-year old guy
). I was really excited to see that he was doing a lot better and had his sense of humor back. So I was standing in the hallway waving back really excitedly, when I see SLI trudging towards the entire scene, walking down the hallway. Again, stone faced serious, though I think i could see the corners of his mouth turn up the tiniest bit!! but his eyes of course communicated. . . I'm not even sure how to put it. . .
acknowledgement of the situation perhaps. Of course, seeing his lack of facial expression made me tone down the hilarity quick.
I found that whole situation, including SLI's reaction, really funny and cute actually.
That's the thing. . .SLI's are expressive but you can only really see it in the eyes most of the time. You can also see it when they release their control of their emotions (e.g. when under the influence of alcohol or when very tired). I saw it happen with my own eyes. It was after a hard night's work--our boss made a raunchy joke, and SLI just couldn't hold it in. I could see him trying to suppress it, but he broke out into the most pure bright genuine smile I've ever seen on him and laughed. He was even trying to suppress the laugh. It was an AMAZING sight. And interestingly, I could tell he felt embarrassed afterwards. And never again to be repeated.
p.s. i take that back, I had a couple more SLI smile sightings (the genuine ones), in context with our dualization but not too relevant to this discussion.