I found a link on Rock's site (bottom of the article) talking about the first gay divorce happening after a short 5 months. The linked article is speaking of the dangers of the homosexual lifestyle (focuses on the men) and it mentions a study done in Sweden in May of this year. This study "compared married gay couples to married heterosexual couples. Results showed that gay male couples were 50 percent more likely to divorce and lesbian couples were 167 percent more likely to divorce than heterosexual couples."
First marriages end in divorce %50 of the time, it goes up to %75 for second marriages. That would work out to be a %75 divorce rate for males and %83.5 for females and a statistical guarantee that any further 'marriages' will end in divorce. Were I a lawyer who dealt with divorce or prenups I would be all for homosexual marriage.