Rule 34 Dev - bone_arm butt cybernetic_arm cybernetic_limb cybernetic_spine cybernetics for_a_head gills machine male nude piercing rear_view solo spine_implant teeth deepmouf animal_head animal_humanoid arthropod arthropod_humanoid beetle_humanoid cyborg humanoid insect insect_humanoid 2023 artist_name hi_res portrait three-quarter_portrait|18268394375