He added: “The reason the practice is so common is that ordinary people see family inter-marriage overall as something that is very positive, something that helps build family bonds and helps put families on a more secure financial foothold.

    • It’s like many forms of incest, there’s typically a power dynamic that results in a victim. Not to mention, society pays the price of covering children born at a higher risk of genetic disorders. Morally, there’s nothing wrong with two consenting adults getting it on, practically, it’s rarely consensual in incestuous relationships.