Marriage: What is Marriage?

Couldn't resist that quotable from "The Princess Bride" -- although it was actually pronounced 'mawidge' in the movie, but.. never mind. For to the answer, comedian Chuch Nice had something interesting to say about it, particularly the aspect of fidelity in marriage. He refers to infidelity as a lack of character. On the other hand, Jenny Block from Newsweek wrote something else in "The Case Against Monogamy". Perhaps without realizing it, what she writes contradicts what she was actually writing about. The lesson she seems to derive from experience and the Tiger Woods affair is that one should simply have open marriages, i.e., no fidelity required:

Frankly, I'm surprised anyone's surprised. Woods's entire life is based on winning; on having, doing, and being more. So why on earth would anyone think "settling down" was even in his vocabulary?

But marriage is about settling down -- committed faithfully to one's spouse. So perhaps one should not marry unless committed to what it entails, including fidelity. Not that one cannot fall, but there should be an absolute intention not to.

Celebrity or not, cheating is human nature.

This is what makes marriage special: it goes beyond human nature. Don't we still celebrate heroism today, of those who go beyond what is typical and expected, beyond the mundane, for love, honor, or justice? What's more, fidelity in marriage calls for the supernatural, something that calls for our natural instinct towards romantic ideals of faithfulness, but pushing it through to heroic and supernatural fruition.
Of course, people can fail these ideals -- who doesn't? But here is more evidence of the supernatural: have human beings not also exhibited, from time to time, conversion and forgiveness?