The 4 is attracted by the insight, the intellectual curiosity, the analytical skills and the reflections of the 5. The 5 is attracted by emotional depth, creativity, open-mindedness, and the ability to maintain deep conversations of the 4. Both are individualistic, like to use their imagination, and are interested in the meaning of things in depth. The 5 can create new centers of interest in the 4 by sharing his thoughts on all the different topics that interest him, and the 4 can help the 5 to explore his inner emotions.
The 4 can have a lot of trouble with the emotional detachment of the 5 because he needs to feel deeply emotionally connected with his partner. Thus the 4 can feel the 5 as being too detached, unavailable, indifferent and cold. The 5 can find the 4 as being too emotional, lacking attention, depressed, dramatic and difficult to satisfy.