I have an attractive co-worker who told me that she's had a couple of male cousins hit on her and one even said, "I only look at you as my cousin from the waist up!"
Cousin marriage is actually very common in the world. Some do it to keep wealth in the family. Others do it maintain ethnic, religious and royal ties. Half the married people in Iraq are married to their first cousins. And almost all European royalty is kin to each other. Also, back in the day, many Creoles, mulattoes and such would marry cousins to maintain light-skin in the family.