The Poultry Play Young actress lying on the stage with her legs apart. Young actor lies in front of her. With his hand up her dress he talks about what he is doing, she moans. Not far away from them an elderly woman rises to her feet and, leaning on a walking stick, slowly makes her way to the central aisle and up the stairs to the exit. The Melbourne Theatre Company is looking for a younger audience. The play, by British playwright Mike Barnett, is called Cock. It’s matinee Wednesday at the Arts Centre. After the usual sort of…