You've probably heard of Japanese artist known as Rokudenashiko ("good for nothing girl"), who was arrested in 2014 for sending the 3-D data of her genitals to patrons of her successful crowdfunding campaign to create a vagina-shaped kayak.

And although the Japanese-language press echoed the police's description of her as a "so-called" artist and orchestrated a public shaming, your reaction was likely to be one of disbelief. That a woman could be arrested in this day and age for such an act — and in a country where sexually explicit manga and imitation-vagina sex toys are sold at convenience stores — seemed absurd. Surely the police had more "obscene" things to go after?