It's a tempting argument. After all, a date tends to be artificial. Each person is "up" for the occasion, and they make an effort to have a good time together. But marriage is quite different from dating. In marriage, couples are together when they're "down," too. Wouldn't it make sense for a couple to live together for a while, just to see how they react to each other's "down" times? If they discover that they can't adjust when they live together, they don't have to go through the hassle of a divorce. Besides, isn't it easier to adjust when you don't feel trapped by marriage?