The occurrence of double first cousins is relatively rare in the United States and other Western countries, as it typically requires a specific set of circumstances, such as two sets of siblings marrying each other. However, it may be more common in certain cultures or regions where arranged marriages between relatives are more prevalent.

In some parts of the world, such as the Middle East and South Asia, cousin marriage is more common, which can increase the likelihood of double first cousin relationships. However, the prevalence of cousin marriage varies widely even within these regions, and it is not a universal practice.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence