I liked Steve Lopez' take on this as well this morning:
"…As for those who argue that legalized gay unions threaten the institution and sanctity of marriage, the statistics leave no doubt that heterosexuals are perfectly capable of cheapening the vows entirely on their own.
L.A. County issues about 75,000 marriage licenses annually. In fiscal 2006-07, there were 108,554 filings countywide for dissolution, annulments and legal separations…'"