Forty-four years nearly to the day after drag queens stood their ground against a police raid on the Stonewall Inn, sparking rioting in New York City and marking the beginning of America's gay rights movement, our nation's highest court at last held that a key section of the Defense of Marriage Act is unconstitutional.

Amazingly, since Stonewall, the question of LGBT rights has evolved from whether homosexuals should have any place in our society to whether gay and lesbian couples should be accorded equal marital stature.

Whenever one group discriminates against another — keeping its members out of a club, a public facility or an institution — it often boils down to a visceral, negative response to something unfamiliar. I call this the "ick." Indeed, the "ick" is often at the base of the politics of exclusion. Just this March, for example, a young woman at an anti-same-sex-marriage rally in Washington was asked to write down, in her own words, why she was there. Her answer: "I can't see myself being with a woman. Eww."