The children they produce aren't even retarded like sibling incest babies(http://www.autoadmit.com/thread.php?thread_id=2131168&forum_id=2...#22182698)
http://en.wikipedia.org/wiki/Cousin_marriage_law_in_the_United_States_by_state(http://www.autoadmit.com/thread.php?thread_id=2131168&forum_id=2...#22182886)