What I meant was that any innocent instrument, like a castanet, could be used in the context of sexual fantasy when designed by anime creators who are experienced with such subliminal methods of visualization.
Euphonium illustrations produced by Kyoto Animation Studios also called Kyo-Ani among anime fans , designed deliberately so that they would inspire subtle sexual fantasies in viewers..
Euphonium: Welcome to the Brass Band Club of North Uji High School.
What an exciting youth story! In other illustrations from the anime, artists have subtly inserted girls holding seductive poses, also showing short skirts flapping in the wind while keeping their undergarments unexposed, because they know veiling something invokes greater sexual thoughts than overtly exposing it.
If Australia classifies this game as child porn, then it is classifying the bulk of one of Japan's main cultural outlets as prurient and abhorrent.