From NPR's report on closing arguments in California's Prop 8 trial:

Andrew Pugno—an attorney defending the state's ban on gay marriage—says there are plenty of rational arguments for preserving traditional relationships. "A same-sex couple can never offer a child both a mother and a father. And that is a reasonable reason for the people to decide to continue to keep marriage as a union between a man and a woman," Pugno says.

A mother and a father—every child deserves 'em.