Rule 34 Dev - abs animal_genitalia animal_penis anthro balls biceps big_muscles bodily_fluids bull_terrier canid canine canine_penis canis collar cum domestic_dog erection eyebrows genital_fluids hunting_dog invalid_tag julius knot male male_only mammal masturbation muscular muscular_male obliques penis precum snout solo terrier triceps tush vein|3681317144