On October 10th, New Jersey 101.5 had an article about cousin marriage:
Whenever the topic comes up, most people are surprised to learn that the United States is one of the few countries in the world where marrying your first cousin is considered taboo.
They will usually joke about states like Arkansas or Alabama, but it is legal here and much more common in other parts of the planet. Worldwide more than 10% of marriages are between first and second cousins. It gets a really shocked reaction here.
Although the article doesn't mention it, consensual incest between people 18 years old or more is not a criminal offense in New Jersey.