We know that not every marriage ends up bringing children into the world, but we also know that every child brought into the world does have a mother and a father.

While procreation can only occur through the complete bodily union of a man and a woman, two men and two women are always biologically incapable of a procreative sexual union.

Marriage Equals offers a helpful new video that explains the major differences between infertile couples and same-sex couples.