Do you know what you're committing to-legally speaking-when you exchange wedding vows? Saying "I do" means you've essentially agreed to a prenup by default. Most people haven't read their state's marital contract, but here's the gist: it was written in the 1800s by a bunch of old chauvinists whose idea of marriage would be best described today as cringe. Have there been tweaks? Sure. How's the foundation? Legally terrifying. And...