Rule 34 Dev - 2019 animal_genitalia animal_penis anthro anthro_on_feral balls black_fur black_hair black_nose black_penis brown_fur canid canine canine_penis canis claws closed_eyes digitigrade duo erection feral fur hair hi_res knot luca lying male mammal markings nude on_back penis quadruped sex sleep_sex sleeping standing toe_claws wolf yaoi zoophilia|3450402560