Also, he has more ammo, knowing where to find the right passages and such. He points us to the book of Mark. In my bible, which is a King James Version, red letter edition (it's not quite what I would call red, though), chapter 10 verses 11 and 12 look like this:
11 And he saith unto them, Whosoever shall put away his wife, and marry another, committeth adultery against her.
12 And if a woman shall put away her husband, and be married to another, she committeth adultery.
If fundamentalists actually took the bible as LITERALLY as they claim, either churches would be a lot emptier or divorce rates would be a lot lower. As Father Geoff also reminds us, the most divorces don't take place in California or New York, but in the bible belt.