Here is a great example of what I mean by intimacy and ease, rather than intensity and clash
Science Says Lasting Relationships Come Down To 2 Basic Traits
"The masters, by contrast, showed low physiological arousal. They felt calm and connected together, which translated into warm and affectionate behavior, even when they fought. It’s not that the masters had, by default, a better physiological make-up than the disasters; it’s that masters had created a climate of trust and intimacy that made both of them more emotionally and thus physically comfortable."
The difference between how couples react to each other seem to indicate how long they will last.
Read more:
http://www.theatlantic.com/health/ar...#ixzz3bgFn4aRe