Most people haven't. I have talked to a LOT of people who were planning on getting married, and I always tell them to get some pre-marital counseling. Every single one of them hates the idea even tho all you do is learn some communication skills and other tools that will help them in their marriage.

I've heard of couples that lived together for years and years, but got divorced after they were married.

On the other side of the coin, there have probably been a lot of people who should have never remained married but did out of tradition or religious reasons.

Another factor - and I'm just rambling off things from the top of my head - is look how most couples date now. They do things like go to movies, watch DVDs together - the majority of what they do doesn't involve sitting down and discussing things that never come up until after the honeymoon.

I could go on and on, there's a lot of contributing factors.