Rule 34 Dev - anthro balls bone duo erection flaccid foreskin genitals grey_balls humanoid_genitalia humanoid_penis male male/male nude penis penis_size_difference skeleton small_penis young young_anthro harmarist sheath_and_knife alex_(harmarist) will_(harmarist) canid canine canis mammal wolf brother_(lore) brothers_(lore) sibling_(lore)|7464106230