“Oh, God, another Asian girl/white boy couple,” I groan, dropping my fiancé’s hand. He hates it when I do this. So do I, really. I know it’s unkind and self-loathing, but every time I see another couple of our racial makeup, a little part of me sinks. We live in San Francisco, so this dip is as common as the hills. In these moments, I wish we were anything else ― that he were my gay best friend or we were startup co-founders, that he were Asian and I were white, that we were exquisitely ambiguous races, or that I...