Is Monogomy an Unrealistic Expectation?

With the rate of divorce being off the charts, it makes me wonder what couples who actually stay together know that the rest of us don't. What makes it work and how can two people "complete" each other and not have any desires for anyone else? Or is it that the desires exist, but they just don't act on them like 98% of the rest of the population?

I was talking with a friend last night and I tried to find people in my life who are in relationships that had never stepped out on their respective mates and I could only come up with two. TWO! (And I know a lot of people!) This extends to members of my family, friends, acquaintances and co-workers. With all of the different people in the world, and the fact that from each day to the next you never know whom you will meet and be attracted to, is it unrealistic to believe in a monogomist relationship? Is it even really natural to believe that we were meant to be with just ONE person for the rest of our lives when there are so many people in the world?

Naturally for me this is a rhetorical question, because I still believe in my heart that I can do this. But the longer I am single, the more that I date, and the more that I find myself wishing I could take one quality from this guy, another from this guy, and yet ANOTHER from this guy. I can't help but wonder if the idea is to get different needs met from different people, as opposed to expecting to find it in one person and then when they can't provide, it's bye bye love and on to the next. I'm sure my married friends would beg to differ, but my single friends would probably concur.

Maybe it's just that I haven't yet met "the one" who would blind me from all others. But even when that does happen, what happens if the blinders come off? Could it be that the divorce rate is so high because we are actually setting ourselves up for failure? When we expect our mates to be the "end all" of our existence, it kind of seems like this is too much weight to put on one person's shoulders. I'm not saying that cheating is the way, I'm just exploring the fact that maybe monogomy is not the most natural instinct and that those who do stay together are the ones making a constant fight to keep it foremost in their relationships.

What do you think?