Rule 34 Dev - angry animal_genitalia animal_penis ball_gag balls black_hair bodily_fluids bondage cross-popping_vein drooling equid equine equine_penis feral fur gag genital_fluids genitals grey_body grey_fur hair harness heiken hi_res male male_only mammal mcfan penis precum saliva shaking solo sweat vein|4473082272