Summary
The video discusses the purpose of marriage as being the context for procreation and the building of a nuclear family. The speaker believes that couples who choose not to have children are rejecting one of the fundamental aspects of marriage. Infertility does not change the nature of marriage, but adoption can be an alternative for couples who cannot conceive. The speaker is opposed to gay marriage because it undermines the institution without a clear understanding of its purpose. However, the existence of gay marriage does not impact heterosexual marriages.