Not fielding the question per se: I have noticed that SJs think everyone is capable of having the SJ mindset (and rightly should work toward that), whereas NTs realize they're different.
Probably NTs realize people are different sooner than SJs, however, that doesn't mean some of us (xNTJs, perhaps?) don't try to convert people to seeing the world the way we do. Conscious manipulation of the standard vs. unconscious manipulation not knowing that there are different standards for types of people.
*You don't have a soul. You are a Soul. You have a body.
*Faith is the art of holding on to things your reason once accepted, despite your changing moods.
This can't be correct, but I always assumed its because EXFXs (ex.) simply feel the need to pass their traits to as many children as humanly possible, while INTs are having difficulty bustin their first nut. Most INTs I know don't want kids anyway.
I don't think we're as rare as most people think, but that a lot of us turn off our N functions in an effort to fit in with this primarily S dominated world. I know it wasn't until I was eighteen that I finally grew tired of hiding my thoughts and opinions from people because I knew it would just make them think I was weird.
I was just reading something by Jung, and he says extroverts have more kids. Introverts, have less kids, but are more cautious and therefor live longer. Each helps preserve the species in different ways.
If both of your Parrents happen to be INTJ's, I would figure that due to a form of conditioning (i.e. living with two cold hearted, crackpots, who may or may not hover over your bed with a knife every wednesday night......)you would pick up there traits, after all, most children tend to imitate their parents at a young age...