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. A double cousins

Why am I attracted to my cousin?

The phenomenon is called genetic sexual attraction (GSA), and some researchers believe its related to whats called imprinting, or a childs normal response to the face of the parent or caretaker of the opposite sex. Most likely its an indirect mechanism, not straight genetic-genetic attraction.

Can double cousins have children?

In other words, double first cousins share the same amount of DNA that you would share with a grandparent, a half-sibling or an aunt or uncle. And they transfer this genetic closeness to their offspring: children of double first cousins are double second cousins, and so on.