"Se represents the raw, animalistic, aggressive, spontaneous hunger for the reality of pure, literal sensory input which Ni dominants take so much care to lock away and hide from others as much as they can. As a tertiary function for ENJs, Se has a much more helpful use, because it's under their control enough that they can use it to show others they care about appearances and trends (for Te- or Fe-oriented business goals), and, if necessary, to subtly imply threats of brute force if the adversary cannot muster up the discipline to respect the ENJ's polite requests for obedience.
But as an inferior function, few INJs learn to command Se to a degree that it becomes a substantial part of their regular healthy cognition. Its literal focus on precisely what is immediately obvious is something many INJs spend their entire lives working hard to eliminate in themselves, insistent that such shallow focus is beneath the sophistication of their constant work to see all the less obvious, hidden interpretations where Ni feels at home. But Se is still there...lurking under the surface, waiting to boil over. You don't want to be around an INFJ when it does.
Ideally, inferior Se should eventually help the INFJ to stop looking for deeper meaning in places where it's neither intended nor useful, to appreciate the more immediate value in that which is tangible and real to others (even though she herself may see it as trivially insubstantial), and to maintain a degree of spontaneity in terms of ability to pay attention to and imitate what others around her see as current and worthy of attention. Sometimes this is the only way the INFJ can get anyone to pay enough attention to what he's saying to make any real noticeable impact or difference in the world--and that's something most INFJs struggle their whole lives to feel like they are doing."
Have a look at this one.
"Inferior Se in NJ's makes them be resentful and dejecting of materialistic, superficial aspects of reality. Periodically, however, they may crave to be around people who are more in tune with the physical world and truly enjoy it, something that the INFJ him/herself has a lot of trouble with. They may crave physical experiences that their higher order functions may not approve of. For instance if Se wants to branch out and see the physical world (much like Ne), but your Ni-values don't approve of this seeing it as pointless waste of time. This can be a cause of a lot of stress and contradiction. A lot of people who have inferior Se often say things like "sometimes I wish I could just let my experiential side come out", or when they get pushed over the edge they might react in very physically expressive ways. (ISFJ's might conclude a similar thing but for vastly different reasons). In contrast, an INFP with inferior might have episodes when they become extremely negative and judgmental, lashing out at their friends with biting specificity."
That's the last of it. Enjoy.