rule 34 2021 animal humanoid balls big penis black sclera blue eyes claws collaboration collar crouching dark body dark skin demon demon humanoid docu doppel doppel duo genitals girly glans hair hi res horn horned humanoid huge cock humanoid humanoid genitalia humanoid penis lightsource looking at viewer male malemale murasaki lightsource nipples open mouth open smile penis purple body purple hair purple skin simple background smile smiling at viewer spade tail tail mouth tongue tongue out unusual anatomy unusual tail vein veiny penis white background 5379650