rule 34 anatomically correct anatomically correct anus anatomically correct genitalia anatomically correct pussy animal genitalia animal pussy anus ass black nose canid canine canine pussy canis dated digital drawing artwork digital media artwork female feral fur genitals grey body grey eyes grey fur hi res independence looking back mammal paper wings presenting presenting anus presenting hindquarters presenting pussy pussy raised tail simple background solo watermark white body white fur white wings wings wolf 5417886