Is this how were going to sneak useless articles onto the front page now? Take completely-unrelated-to-Hacking topic X and apply secondary "Engineering/Hacker opinion" Y to it? "Well, condition Y now makes this Hacker-related, let's submit it!"
Have you read it? It is more about the connection of database engineering and "the real world" than about gay marriage.
Different cultures have different contexts when it comes to marriage. Some are monogamous, but even more are polygamous, where the husband marries the wives, or the wife marries the husbands... It all screams "graph", and I think in the end that's the only way we can represent it.
Which is funny, because that's already how we represent any other form of human relationships - romantic or otherwise...