Consanguinity is a family members.
What is it called when you date family?
The most commonly used word would be incest, although technically, incest refers to sex between (close) relatives.
What is it called when you marry relatives?
A cousin marriage is a marriage where the spouses are cousins (i.e. people with common grandparents or people who share other fairly recent ancestors). The practice was common in earlier times, and continues to be common in some societies today, though in some jurisdictions such marriages are prohibited.
What is it called when brother marries sister?
Double Cousins A double cousinship occurs only when a set of siblings marries another set of siblings and both have children. This could be two sisters marrying two brothers. In your case, this is a brother and sister marrying a sister and brother. Double cousins actually share the same gene pool as siblings.
Can you date your relative?
Legally, you can date and be intimate with your first cousin, but if you are considering marriage, laws vary by state and country. As with all moral decisions, this is a personal, but complicated matter, given societal norms and the many who see cousin marriages as taboo.
Why is dating your cousin wrong?
Marrying a cousin is usually considered a bad idea, because inbreeding can lead to harmful genetic conditions. But paradoxically, in some societies, marrying a related spouse is linked to having more surviving children, research suggests.