"In 1967 the Loving v. Virginia case made it clear that it is unconstitutional for states to prevent interracial couples from marrying. Does anybody argue about whether the partners in interracial couples are "born that way" (i.e., somehow biologically inclined to sexual attraction and love of people from other racial groups) or whether they've "chosen" to partner with people outside their own races? No. In fact the biology of sexual attraction never entered the picture in the Loving decision. The question was one of whether or not it was legal for the state to regulate marriage by taking race into account."

 I love the way you framed this argument.  Thank you for the article.  I just wrote a similar one on my blog without even knowing about yours, in regards to the recent Mother Jones' article "Gay By Choice?"  (although i think you say it better than me)