Japanese art has a long history of depicting unconventional sexual themes, like the famous painting 'Tentacles' by Katsushika Hokusai, aka 'Tetsubou Nurunara'. This artwork portrays a female diver enjoying the erotic embrace of two octopuses, with vivid illustrations and text capturing her pleasure. From ancient times, Japanese culture has embraced rich sexual fantasies, which have influenced today's unique and sometimes risqué culture.