Cousins marrying cousins is one of the few remaining taboos in America. It's not that it doesn't happen, but, like most controversial romances, it's not talked about.
Besides the ick factor, which always accompanies the unfamiliar, the main concern is the children that copulating cousins would produce. Yet now that researchers are finding procreation between cousins is about as risky as a woman giving birth in her 40s, cousin couples are letting the family secret out of the closet. After all, even Charles Darwin, father of natural selection and 10 children by his first cousin, approved of it!
See what you know about famous married cousins and cousin-marriage laws in the US.
All in the Family: Cousin Couples Come Out of the Closet
What two presidents married their cousins?