rule 34 2023 56 ambiguous gender animal genitalia anthro balls big ears big penis black background blue eyes blush blush lines dialogue digital drawing artwork digital media artwork dragon duo eastern dragon english text erection first person view fur genitals gesture gradient penis green hair grey body hair hands on legs hands on thighs hi res humanoid genitalia humanoid penis japanese text kai fu xiao male notravi open mouth penis scalie sheath signature simple background speech bubble spiked penis spikes spikes anatomy teal penis text thumbs up vein veiny penis yellow body yellow fur 8520454