What is it REALLY about?

There is a saying in mediation circles that "what it's about is not what it's about" and I recently encountered a couple who demonstrated this point.
The Husband was very angry with his Wife when he arrived and became even more angry when she showed up 20 minutes late for the session. When we sat down he provided her with a written list of demands and asked her if she agreed to his terms. When she did not he stormed out of the room, swearing and blaming her for driving the two of them to lawyers.
I tried to get him to open up; to discuss the source of his anger so we could explore how to create an agreement that worked for both of them. But he was simply too angry with his Wife to care about her needs. And in a effort to make this quick and easy, he has made it very difficult for both of them.
Thankfully, they do not have children together!