"A guy named Marty McShuffle travels to colonial america and sleeps with a prostitute.
Marty: Man, who could ever knew that colonial women were so easy get laid with.
Prostitute: Marty, do you want to know my name?
Marty: Sure
Prostitute: My name is Jane McShuffle.
Marty: OMG! I just fucked my great-great-great grandma! I am now an incestor!
Someone who had sex with their relatives; attracted to their family members; used to sleep with their siblings, parents etc; commits incest; incesting.