Rule 34 Dev - 2016 abs animal_genitalia animal_penis anthro balls biceps big_balls big_muscles big_penis blush duo equine equine_penis erection fur hair horse horsecock javkiller male male_only mammal multiple_males muscular muscular_male mustelid nipples nude open_mouth otter pecs penis shower sieg simple_background smile standing teeth tongue vein veiny_penis|2224401432