Interesting point of discussion. I couldn't help but extend your thought of love and marriage to an opposite and opposing cause and effect. Just as Buffett speaks about the differences in buying a stock and buying a company, perhaps the divorce is rather an effect of a misperception of love than it is of a failed intuition. It's hard to differentiate the term love in the English language when dictating love for an In-N-Out double cheeseburger animal style with chopped chilis and x toast from, say, romantic love for your spouse. Perhaps the Greeks had it right by having 6 separate words to describe the different types of "love".

My point being that instead of viewing love as an emotion (buying an attractive stock), I see it as more of a commitment (buying an attractive company) where the love feeling is simply a byproduct of the work you put into the investment (relationship). Under this light, the love feeling is a variable dependent upon your own personal emotion and independent of the actual marriage. While a bad marriage may cause a loss in the love feeling, it does not necessarily go the other way.