Characters sprout feathered, leathery, or insect-like appendages from their backs, giving them an angelic, demonic, or outright monster vibe. Artists love big spread poses, dramatic silhouettes, and the way the extra limbs frame nude bodies or make a character look powerful and predatory. In sex scenes, the extra wings often get used for pinning someone down, wrapping around partners like a cloak, or just flexing while someone gets fucked midair.