Eh, kind of doubt it. Most people would rather have their partner break up than cheat on them. It's considerably less hurtful to just leave someone than to carry on a hidden affair.

> The cynic in me also just doesn't think it's sane to expect that an oath to love forever could be relied upon anyway, and the statistics do bear this out.

I guess the optimist in me believes that if a partner is no longer in love and no longer interested in trying, they should break up rather than cheat. Similarly, I believe a business partner who no longer wants to be involved in the business should sell off their shares rather than purposely tanking the business.