Consanguine marriage

Imagine you have two families that are related to each other. Maybe they are all cousins, or maybe they are brothers and sisters who grew up together. If someone from one family marries someone from the other family, that's called consanguine marriage.

Sometimes people think it's not a good idea for family members to marry each other. One reason is because if people who are closely related have children together, there is a greater chance that the children will have health problems. This is because their genes are more similar and there is a higher chance of passing on bad genes.

Because of this, some places have laws against consanguine marriage, or they only allow it between certain family members (like cousins but not siblings). But in other places, people might still choose to get married even if they are closely related. It's a personal choice that some families make, but it does come with potential risks that they should consider.