Really?
Gay people cannot marry but we have to protect the sacred institution of man-and-woman marriage so that people including Kim Kardashian (filed for divorce today after 72 days of marriage to Chris Humphries) and Britney Spears can treat it like they have? Honestly? See this roundup article for other very short marriages that do a great job of presenting marriage not as an eternal commitment but something very similar to a vacation. Or trying a new haircolor.