If Marriage is Designed for Pro-creation Should Christians Unable to Have Children Marry?

John and Shane field a question on adoption. A listener wrote in to ask if adoption to a homosexual couple is better than a child being parentless. They then work through a question on if a Christian should marry if the marriage looks to be childless.  John and Shane close the question and answer time looking at immigration. A listener asks for a worldview perspective on a topic that has become strongly politicized.