I could be wrong, but I think heterosexual marriage is threatened more by heterosexuals. I don't know why gay marriage challenges my marriage in any way.
The general proposition is that the resources that will be utilized are the ones that contribute most to the overall efficiency of the production system. The third parameter has to do with our commercial world, our search for profits.
One of the greatest things drama can do, at it's best, is to redefine the words we use every day such as love, home, family, loyalty and envy. Tragedy need not be a downer.