>>413647653
There isn't one because VR is no different to flat. The argument that the fictional media we consume will influence our adult behaviour always fails to consistently show the negative outcomes needed to justify any prohibition.
It gets even more complicated when you think about ERP. 'Two consenting adults' is the justification for decriminalization and acceptance of all sorts of stuff IRL but throw those dudes into loli avatars and suddenly people stop feeling so progressive.