Oh, come on!

I had heard of this in the form of a post-marital contract as far as getting couples to compromise on doing things for each other. For instance, "I promise to do the laundry once a week, if you promise to provide (xyz sex act) in return". But, this seems to be a lot more serious and will cause a lot more consternation.

You start a new business and you want to make sure your spouse doesn't get to walk away with 50% of its assets if your marriage falls apart. How's that for positive thinking?

I suppose it could be argued from a practical standpoint, but the only people I can see pushing this idea are lawyers who are trying to drum up more fees, since fewer people can afford to actually get divorced in lean times (what with lawyer fees and court fees being such a huge expense, not to mention trying to sell a jointly owned house).

This might be a good idea if you are planning on getting a divorce, but the timing is wrong due to the economy. But, how unromantic.