You want to cooperate with each other, but instead, somehow, you get into power struggles again and again. The intensity of this aspect can be mitigated by other, softer ones that promote harmony between you, but in general, this one is hard to deal with. You try, consciously or subconsciously, to force your partner to change, because their methods of processing the world and their place in it don't match up with yours.
They're much more intellectual about things than you are, and they probably push you to take a stand on your principles, or worse, to define your feelings in terms of logic. Logic, of course, doesn't apply to the emotional realm, as they're two completely different things. And what happens when an emotional person is pushed relentlessly? That's right -- those emotions tend to explode! You both take your own side in a serious and dogmatic way, clinging to your own beliefs so fervently that you could forget there's any other way of experiencing the world. In some big ways, you disagree -- on spirituality, sexuality, you name it. Instead of trying to listen to each other and respect your differences, you put each other on the spot and try to force each other to defend your position. Challenges like this can be really hard to deal with, and could make you feel divided as a couple. On the other hand, this relationship could push you to define yourself in ways that you've never thought of before.