The Christian Post lays out the argument behind the "Marriage = Biology" video we released recently:

"Is it fair for the government to promote natural marriage but not same-sex marriage? Isn't this discrimination against homosexuals? What about equality? These questions are addressed in a new video ad by the National Organization for Marriage.

The conservative marriage group released the video, titled "Marriage = Biology (Not Bigotry)," on Monday, weeks ahead of the November elections when voters in four states will vote on whether to redefine marriage.

...What about tolerance?

"Yes. Same-sex advocates need to be more tolerant," the video argues. "Homosexual relationships are already tolerated in the U.S. They can already commit themselves to each other until death do them part without government endorsement.

"But only the union of one man and one woman should be promoted because it alone is the foundation of a civilized society.

"That's not bigotry. That's biology."

Voters in Washington State, Minnesota, Maryland and Maine will vote in November on whether to protect traditional marriage or allow same-sex couples to get married."