Nope...neither.
As I stated previously the government has no business in the marriage business. If they need to track it for citizenship purposes then all unions as far as the state is concerned should be civil unions.
Marriage has traditionally been a religious ceremony best left to the religion of your choice.
The State (Govt) most certainly has an interest in preserving marriage, as marriage results in families. Familes are what make up villages/towns/cities/states. Without the "family", society, and to a large extent, basic human morality are thrown under a bus.
The State recognizing marriage as one man-one woman preserves that tradition which has held society together. If the State were to suddenly dissolve that, and make marriage and family whatever anyone wants it to be, society will suffer because of that experiment.