Child Adoption: Rescued Orphans. There are so many reasons why gay marriage should be legalized, one of which being child adoption. Our orphanages aren't full, but we want them to be as empty as possible. Gay couples biologically can't have children on their own. Everyone knows that. However, many gay couples that want children would revert to adopting. That means that a lot more of orphans would be given loving parents, a better home, and a proper education.