‚Mykki Blanco is a gay dog.‘ MYKKI BLANCO did not spring from nowhere. Rather, she emerged, Venus-like, one day last summer, when Michael David Quattlebaum Jr. decided to step out for the first time in head-to-toe drag, including a black bathing suit with padded breasts and fake Chanel purse. Since then Mykki Blanco, Mr. Quattlebaum’s glamazon alter ego, has become a redoubtable presence on the downtown art and cabaret scene. More avant-garde objet d’art than drag queen, Mykki wears a fearsome honey-brown wig while performing allusive rap with a radical-gay bent. Going to be a crazy one…