From 365gay.com:

Once people started eschewing marriage as a business proposition and instead partnered up based on something as fleeting as love, all convention was thrown out the window, says Stephanie Coontz, author of "Marriage, a History: From Obedience to Intimacy or How Love Conquered Marriage."

"Staying together 'til death do us part' is a bigger challenge than any generation ever had to face," she said. "The fact remains that you're never going to get back to a situation where you can assume every adult is going to spend the majority of their life in marriage."

The author of five books, including "The Way We Never Were: American Families and the Nostalgia Trap," teaches history and family studies at The Evergreen State College in Olympia. Coontz, 61, said she has spent years "trying to get past our 'Leave it to Beaver' mythology about what the traditional family was."

The implication is that marriage was fundamentally altered by straight people, not by gay folks who want to be married.