The base argument is that two consenting individuals younger than 18 are not actually legally capable of giving consent, and therefore falls under the category of statutory rape. True enough on the legality - but a hugely weak argument for legalizing posession of child pornography. The example goes ...

I am not a lawyer, but that definition of child porn seems to clearly exlude anime. In order to qualify, an image must:
A) "involve the use of a minor engaging in sexually explicit conduct"
OR
B) "be indistinguishable from, that of a minor engaging in sexually explicit conduct"

Clearly, no actual ...