[SparklingImpediments]

Originally Posted by phoenix13

I think it's maybelline.

I don't know if it's hereditary, but to a certain extent it's probably fixed (ie, I'll be ENFP for the rest of my life). Also, P and E aren't traits/functions in themselves. P means your perception function (N or S) is extroverted. E means your dominant function (N, S, T, or F) is extroverted.

Btw, according to Myers Briggs theory, there are only 8 cognitive functions:
Introverted Sensing, extroverted sensing,
introverted and extroverted intuition,
introverted and extroverted thinking,
introverted and extroverted feeling.

Check it out: Understanding the Eight Jungian Cognitive Processes / Eight Functions Attitudes

Maybe...