TAKEN FROM ANOTHER BLOG -- an interesting idea that i felt i ought to share:
I read Sheldon Vanauken's book A Severe Mercy a couple years ago and in it Vanauken chronicles his love story with his wife. They come up with a wonderful idea, as they see themselves as defenders and architects of their love and think strategically about how to protect and sustain it. One of their methods was to invest time and energy into investigating whatever the other was interested in. To be devoted to the same hobbies (or at least knowledgeable about the area) created a stronger bond.
Vanauken writes (swiped from her blog): "If one of us likes anything, there must be something to like in it-and the other one must find it. Every single thing that either of us likes. That way we shall create a thousand strands, great and small, that will link us together. Then we shall be so close that it would be impossible-unthinkable-for either of us to suppose that we could ever recreate such a closeness with anyone else. And our trust in each other will not only be based on love and loyalty but on the fact of a thousand sharings-a thousand strands twisted into something unbreakable.”
As a side note: later on in the book Vanauken is honest about how, once his wife became a Christian (and he wasn't yet), he did have a moment of emotional infidelity where he felt a bond with another woman. I still feel that the idea stands up as a good one. At the very least it is a loving thing to seek to understand what your other half sees as good.