West Virginia Incest

The act of having pure, heterosexual, vanilla sex with a partner that is not related to you in any way. No pissing, shitting, violence, or whatever other unspeakable ask that could be thought of.

West Virginian 1: I got laid last night.
West Virginian 2: With who?
West Virginian 1: Gabriella BigTits
West Virginian 2: Bro, that's some crazy West Virginia incest.