From a thought experiment I did I realized the way my brain works is similar to what could be expected if the brain was exposed to a large amount of both male and female sex hormones, causing the left hemisphere's traits to exaggerate while the right hemisphere also exaggerates. Logically, this would at a certain point lead to a condition that could be recognized as a pathology, since it would cause a great amount of internal conflict(anxiety) and because the two hemispheres are so different trouble integrating the senses(sensory issues, could cause a mix up in the processing of empathy).
I also notice my finger lengths are "different" from each other. My left hand (Right hemisphere) has equal finger lengths, while my right hand (Left hemisphere) has a shorter index finger than the ring finger. Studies show finger lengths correlate with the amount of sex hormones exposed to in the womb. Women usually have equal finger lengths. Men usually have a shorter index finger.
On top of that I am bisexual and what I like in men and what I like in women has always been different from each other. I thought about those preferences and while I tend to like some strange features on men I tend to prefer more symmetry in women. This corresponds with the different preferences of the hemispheres.
I've always been in a tug-of-war over many decisions. I might agonize over things people rarely do if they agonize over and then still do it for the sake of experience, and spontaneously do things people usually fret over.
I've always had a hard time with personality tests. Too many questions vary on context or it lumps things together with "and" where I would have answered differently for the two. I looked at Carl Jung's descriptions, considered the descriptions and realized I'm a paradox on all accounts. I tend to use the "one" ability for the "other" purpose. For extraversion/introversion I'm usually either inside my own world thinking about the world outside(my special interests are the social sciences, particularly political theorizing) or in the world outside where I experience things that I know I will later be considering in my own world as I think of the outside world. For sensing/intuiting I tend to do intuitive things by purposely thinking about it and sense a lot of things intuitively that most people would have to think about. For thinking/feeling, I see the primary purpose of logic and reason as maximizing utility i.e. happiness so I use thinking to the purposes of feeling, and sometimes use thinking against thinking, decide to "go by feeling" because I logically conclude that doing so will make me happy. I also do "thinking" for the fun of it sometimes. For judging/perceiving I always like to have a plan but hate plans that can not be changed if I decide to, hate it when plans get disrupted if it wasn't my idea(which happens a lot), hate it when I have the idea to change a plan and can't, am very judgemental of anyone who is judgemental of others in circumstances I consider inappropriate(example, racism), and I'm sometimes serious about not taking certain things too seriously.
http://www.personalitypage.com/html/four-prefs.html
I am right-handed, but notice that if I try to draw something in wide strokes(as opposed to precision) I do a better job with my left hand.
Plus I live downstream from a chemical plant. Remember that news about frogs "changing sex" because chemicals had the same effect as sex hormones?
I don't know if this is everyone's reason, but think it is the reason for me.
