Here's an interesting article you all might be interested in:
http://query.nytimes.com/gst/fullpag...56C0A9679C8B63
"Bible Belt Couples 'Put Asunder' More"
It's about how Christian couples [specifically those living in the Bible Belt] are 50% more likely to get divorced than those who are less religious. It also has a bit in on it about cohabilitation before marriage.
I'm linking this specifically because a lot of people say that living together before marriage causes divorce because of 'statistics', but correlation does NOT equal causation. If cohabilitation causes divorce, so does Jesus