Rule 34 Dev - 2017 anal anal_sex animal_genitalia animal_penis anthro anvil_position balls bed bedroom black_fur black_penis canine canine_penis chest_tuft claws closed_eyes collar duo erection fox fur grey_fur hair hi_res inside knot legs_up lying male mammal masturbation nude on_back orange_fur patrikthedog penetration penis piercing precum saerro sex tongue tongue_out tuft white_fur wolf yaoi|2831999344