Rule 34 Dev - 2017 anal anal_sex animal_genitalia animal_penis balls black_balls black_body black_fur black_penis blue_eyes brown_balls brown_eyes dated duo equid equine equine_genitalia equine_penis erection feral feral_on_feral feral_penetrated feral_penetrating feral_penetrating_feral from_behind_position fur genitals gradient_background grey_body grey_fur grey_mane grey_tail hi_res horse male male/male male_penetrated male_penetrating male_penetrating_male mammal mane mounting penetration penile penile_penetration penis penis_in_ass pink_penis rufciu sex side_view signature simple_background tail tan_body tan_fur tan_mane tan_tail white_body white_fur|12625214320