I have considered negative sx-dominance for my type...the memories that the descriptions of sx 4 bring up are the earliest and most basic. If typing was only about what we are like in our home spaces with our intimates, I would be Sx dominant unquestionably. It was the way I saw the world and other people.
But there was a hard line at the front door from even the earliest age. Once out in public, I would become the polar opposite sort of kid: no longer a fighter, quiet, timid, irresistibly breakable, a lot like the really yucky so-dom descriptions. Competitive rage magically...gone. Inside, I was in love with love itself and always, even in gradeschool, was transfixed by particular beautiful people, but I never let that on to anybody. Didn't even date. I had intense interests that would occasionally leak when I burned myself out on them. Ridiculously...I could be wedded to something like, say...math? An art series? Merely an idea? To the point where working at them could push me to tears or doing dumb shit like sleeping 8 hours total a school week or drastically changing schools based on an inspiration I'd had earlier the same day (to somewhere I had no chance to survive in, of course)...ironically yet unsurprisingly I was at times ejected violently from any chance to seriously pursue something I loved because of emotional burnout converting to physical breaks. From the outside...few knew. May God have finally given peace to those who did!
No clue in hell why the extreme split. It still exists in adulthood, though my public mode is more sp-like, stony. I'd need to be convinced hardcore that such a public/private personality burnslash could be compatible with sx before I'd claim the instinct as anything but last again. When I read about sx 4, I see indomitable. That person wouldn't let themselves be silenced by the world. I did.