The way I interpret it, syn-flow vs contra-flow strongly coincides with positivist vs negativist dichotomy.
Synflow: sp/so > so/sx > sx/sp :: Compelled toward people, participation, involvement -> Positivist
Contraflow: sp/sx > sx/so > so/sp :: Compelled against and/or solipsistically away from people > Negativist
This thread made me look for informations about instinctual stackings and while I still haven't typed myself, I came to one conclusion:
Instinct stackings are about focus, not strength.
The last instinct is called a blind spot and it's a very good term. Blind spot is the place of our visual field where image detection doesn't occur.
Let's imagine a tree. It's a very important tree and we want it to grow tall and strong. But if we stand too close to the tree, we won't be able to take care of it properly - we don't see surroundings, therefore we don't have information about the soil, the weather, if our tree is lone or a part of some forest.
Let's take a few steps backwards.
Now we can see not only our main object of interest (tree) but also the surroundings. The object on which we focus our vision is the area of first instinct, the surroundings is our second instinct and there is still an area that we don't see, which is our blindspot. But at least now we can care properly about our tree and its surroundings.
But sometimes we need to pay attention on more things than the tree - what if there is a madman with an axe behind us? To see our blindspot area we can do one of the two things:
1.Take a few more steps bacwards. We can see everything but then our main object of interest becomes blurry, we cannot see it clearly and therefore cannot take care of it.
2.Turn the head from our main object of interest. Change the focus. We don't want to lose the tree from our sight but we can do it for short time periods if we need to.
That's why the last instinct is often underdeveloped when compared to the first two. We focus on it sporadically unless we make an active effort to get better in a given area. The second instinct can serve as a mean to develop the first instinct but also to keep it at bay.
"So I am indeed sx/so. I focus on and struggle over close relationships. I rarely think about physical safety or well-being; that sort of awareness comes naturally to me, and I skip meals to talk to people because relationships are a higher priority and I can have a meal any ol' time."
I'm not sure this is really points for Sp, though. An Sp can forget to eat all the time (thus not thinking about it, same as you), for example. Whether or not a person is consciously focused on it is not necessarily indicative of anything. Someone might not consciously focus on Sp boundaries, or seeking comfort in food / temp / etc., etc., but that's what happens naturally--at times so much that they don't think about it any more than they think of breathing. Overall, strength and focus is often going to be one and the same, as that is their primary mode of operation and supposedly the main drive. For example, as an Sx Dom I might not always be able to connect to someone, but I still naturally know how to draw people in or push them away. Sometimes peopel can be balanced though. Perhaps your Sp and So are?
★ INTP Ti/Fe & Ne/Si 9w8 Meme / 5w? / 4 Sx/Sp C?-LII-Ne
ᴛᴏ ᴀᴛᴛᴀɪɴ ᴋɴᴏᴡʟᴇᴅɢᴇ, ᴀᴅᴅ ᴛʜɪɴɢs ᴇᴠᴇʀʏᴅᴀʏ. ᴛᴏ ᴀᴛᴛᴀɪɴ ᴡɪsᴅᴏᴍ, ʀᴇᴍᴏᴠᴇ ᴛʜɪɴɢs ᴇᴠᴇʀʏ ᴅᴀʏ. ― ʟᴀᴏ ᴛsᴇ
high sx means you're a sexy Chad like me
K. I might be the stereotype..... but, there's never been a day that I've never thought about sex. Ever. Except maybe when I blacked out, and who knows, what I'm dreaming?? SO THERE, THAT'S THE RUB. DON'T NO ONE MAKE FUN OF ME FOR IT!!
sx/so/sp--does this have to be here 'cause it's pretty absent in me