According to Jerry Seinfeld it is,
“Real married couples, having a real fight in their home. They’re not in the studio. We watch the video in the studio with a live audience and a panel of celebrity guests and Tom, who is our `marriage ref.’ And we’re going to watch the argument.
“We’re going to discuss the argument: who’s right, who’s wrong. And we’re going to make a call in favour of the husband or the wife, very similar to the way it’s done in sports. Because we felt the sports simplicity is what’s missing in marriage. Like, if you ever played a sandlot game and there’s no umpire, the fights just go on and on.
“Marriage is like that, too.”