Married people buy houses. According to the Bureau of Labor Statistics' Consumer Expenditure Survey Anthology, married couples can be almost twice as likely as singles to purchase houses, depending on their age and income levels. Allowing same-sex couples to marry would make it easier for them to purchase houses together. Given the importance of the housing industry as a driver of the nation's economy, legalizing same-sex marriage could give industries ranging from new home construction to interior design a significant and welcome bump. Married couples invest. There's nothing like getting married and settling down to inspire consumers to look at their long-term finances. Newlyweds typically buy life insurance -- often for the first time in their lives -- and may be more likely to invest in retirement funds and annuities. For the financial-services industry, same-sex marriage could provide a solid new stream of reliable customers looking for a secure future. Married couples have kids. While it's certainly more common for singles to become parents than it once was, married couples still have the edge when it comes to starting families. Biology no longer precludes same-sex couples from having children, thanks to a range of new medical procedures, and legalizing same-sex marriage would also facilitate adoption by same-sex couples. Middle-income same-sex parents will spend an average of $235,000 per child on everything from formula and diapers to college tuition, which should have companies from Gerber to Disney ( DIS) positively salivating.
But if the fundamentals of supply and demand are to remain the bedrock of our economy, it ought to be possible for consumers of any faith or none to be able to buy the goods and services that they require without running the risk of discrimination. We'll know in a few months whether DoMA will stay or go. Societal norms are shifting fast enough, however, that DoMA is likely to be repealed in the future even if the Supreme Court doesn't strike it down now. Smart business executives will be thinking ahead, and planning for how best to serve the needs of same-sex married couples regardless of what the court decides. This commentary comes from an independent investor or market observer as part of TheStreet guest contributor program. The views expressed are those of the author and do not necessarily represent the views of TheStreet or its management.