what your meant by a "JOY STICK". You amused me so much and immediately reminded me of 启明 who listed a bunch of Chinese idioms days ago, in which embeded whatever one thinks is eroticism.
In this sense, English is not that far away from Chinese.
By the same token,"JOY STICK" can be replaced by the "CANDY STICK", or by the "RESIDENT OF GRASS COTTAGE", a famous alias who was kicked out in this thread recently.