Our parents' relationship offers us our first glimpse of the pros and cons of marriage, so if his mom and dad communicated best through lawyers, saying "I do" might be a huge don't. "I know a few guys who remember their parents' relationship as being full of poison, and the idea of marriage brings up the pain they felt when their parents divorced," says Steve, 31, of Boston. "So instead of proposing to the women they loved, they broke things off when it got to that point in their relationships."