Interesting to note: the same group that pushed for gay marriage in Mexico City is now pushing for "time-limit marriage":
Mexico City lawmakers want to help newlyweds avoid the hassle of divorce by giving them an easy exit strategy: temporary marriage licenses.
Leftists in the city's assembly -- who have already riled conservatives by legalizing gay marriage -- proposed a reform to the civil code this week that would allow couples to decide on the length of their commitment, opting out of a lifetime.
The minimum marriage contract would be for two years and could be renewed if the couple stays happy. The contracts would include provisions on how children and property would be handled if the couple splits. --Reuters
The BBC adds:
"...the bill has attracted criticism from families campaigner Consuelo Mendoza. She attacked the initiative as contributing to a "throwaway culture" in respect of society's institutions and said it would put children through the anguish of wondering whether their parents would stay together."