2018 5_fingers abs animal_genitalia anthro ball balls barefoot biceps biped border bull_terrier canine claws collar detached_sheath dog ear_piercing fully_sheathed holding_ball holding_object looking_at_viewer lying male mammal muscular muscular_male nipples nude on_back outside_border pecs pencil_(artwork) piercing royce_(hurst) sheath signature solo tanutanuki tennis_ball terrier toe_claws toes traditional_media_(artwork) white_border