Rule 34 Dev - abs animal_genitalia animal_penis anthro armpits ass balls biceps blush bull_terrier canid canine canine_penis canis domestic_dog erection hunting_dog invalid_tag julius knot light male male_only mammal muscular muscular_armpits muscular_male nipples nude obliques one_eye_closed pecs penis pose serratus_anterior sunlight terrier triceps tush vein wink|3749744064