The move toward marriage has not been driven by young gay and lesbian couples rushing to the altar

The decline of marriage is upon us. Or, at least, that's what the zeitgeist would have us believe. In 2010, when Time magazine and the Pew Research Center famously asked Americans whether they thought marriage was becoming obsolete, 39 percent said yes. That was up from 28 percent when Time asked the question in 1978. Also, since 2010, the Census Bureau has reported that married couples have made up less than half of all households; in 1950 they made up 78 percent. Data such as these have led to much collective handwringing about the fate of the embattled institution.

But there is one statistical tidbit that flies in the face of this conventional wisdom: A clear majority of same-sex couples who are living together are now e-sex marriage was illegal in every state until Massachusetts legalized it in 2004, and it did not become legal nationwide until the Supreme Court . Two years after that e-sex couples who were sharing a household were married, according to a set of surveys by Gallup. That's a high take-up rate: Just because same-sex couples are able to marry doesn't mean that they have to; and yet large numbers have seized the opportunity. (That's compared with 89 percent of different-sex couples.)

In fact, half of them were age 50 or older. The only way that could have happened, given that same-sex marriage has been legal for less than 15 years, is if large numbers of older same-sex couples who had been together for many years took advantage of the new laws. In other words, changes in state and federal laws seem to have spurred a backlog of committed, medium- to long-term couples to marry.

So why e for them a public marker of their successful union, providing them the opportunity to display their love and companionship to family and friends

Why would they choose to do so after living, presumably happily, as cohabiting unmarried partners? In part, they may have married to take advantage of the legal rights and benefits of married couples, such as the ability to submit a joint federal tax return. But the legal issues, important as they are, appear secondary. In a 2013 survey conducted by the Pew Research Center, 84 percent of LGBT individuals said that “love” was a very important reason to marry, and 71 percent said “companionship” was very important, compared to 46 percent who said that “legal rights and benefits” are very important.

In both the year before and the year after Obergefell, only one out of seven people whom the Census Bureau classified as in a same-sex marriage was age 30 or younger, according to calculations I've done based on the bureau's American Community Survey

Yet the emphasis on love and companionship is not enough to explain the same-sex marriage boom. Without doubt, most of the middle-aged same-sex couples who have married of late already had love and companionship-otherwise they would not have still been together. One reason, of course, was the desire to claim a right so long denied, but that only further underlines the way in which marriage today signals to the wider community the success of a long-standing relationship.

In this sense, these gay couples were falling right in line with the broader American pattern right now: For many people, regardless of sexual orientation, a wedding is no longer the first step into adulthood that it once was, but, often, the last. It is a celebration of all that two people dating a Lagos lady have already done, unlike a traditional wedding, which was a celebration of what a couple would do in the future.