A government minister in the UK is blaming birth defects on inbreeding... among immigrants, especially among Pakistani immigrants. While at first glance we cried racism, apparently guidelines for arranged marriages within some ethnic communities lead to inbreeding.
So, hey. Don't fuck your cousin with the purpose of pro-creating. Unless you want your babies to have birth defects.
[The Guardian: Birth defects blamed on immigrant inbreeding]
[Democracyfrontline.com: The Family ties that bind]