everything about Ni+Ti introverting, truth/meaning seeking, big picture viewing singular answer finding seeking the answer to its E counter parts Fe + Se = a hard wired preference for proving itself via analyzing the situation and applying those concepts in a way that requires another individual and their needs in a very physical and tangible way. All that together makes someone who is basically devoted to their partners ability to orgasm and orgasm hard. I have always seen INFJs as sort of a reverse vampire. We are service oriented to other people around us, and especially so to those we cherish, like a wife, or a husband or a girlfriend etc.
I know that sex to me is very interesting. Not just because it feels good but because its like a really long term dance, it actually has a rhythm. I like to learn how that rhythm changes and refines itself to fit another persons needs... at least thats what I always believed was supposed to happen. I know that many people don't do that, they just maintain what always was their idea of the best sex, which usually dissatisfies the opposite party because everyone has their own preferences.
And I have heard that story a lot of times from men and women alike talking about the subject... so it leads me to believe that not everyone applies the same standard, ergo it might be something more aligned to specific personality types.
INFJs for example, and ENFJs I would think specifically. but only because I spent more time analyzing those function groupings.
But back on point and to my vampire analogy, we seem to give 1st, then take what we need in return. You know like a vampire who will feed you its blood before it bites your neck. We seem to operate this way sexually as well. I know for my part I cannot stop or go to sleep if I feel like I didn't share a mutual satisfaction. Of course I realize not every INFJ might operate this way, I cant be sure, my experience as an INFJ and with 2 other INFJ's I "knew" and my brother who is INFJ and what I know of him is what I am basing this off of. And my theoretical understanding of how these processes work.