Al and Tipper Gore are separating after 40 years of marriage. It's not as rare as many people think for couples who have been together for decades to split up. "The romance that happens in a courtship doesn't continue forever," says Temple psychiatrist Paul Fink. "Marriages change and evolve. And sometimes they go in the wrong direction, so I'm not shocked at the fact that the Gores are separating. I think they just don't want to continue doing whatever they were doing to irritate, offend and perhaps hurt each other."