If I were dictator of Canada, I would make it NOT a crime merely to possess imaginary-child-porn. That includes cartoons you draw, and stories you write, for yourself, for your own perverted reason. I would make it not a crime on what IMO is the very sound grounds, that no person under 18 suffers any harm.
I would also make it NOT a crime, merely to possess a photo in which the model is displaying her genital area, where the model is proved to be over 18, even though she appears to be under 18.
Disagree with these views if you will. But if you disagree, I would ask you to point out how any actual child under 18 is, or might be, harmed by your mere possession. Expressing the wish that I rot in hell for holding these views does not count.
The fact that some terbites apparently have not yet completely grasped is that, in Canada, those things ARE crimes.
IMO, it is inescapable that some of the models in some of the photos displayed in some terb threads appear to be under 18.
If you are happy that these terb pictures fall outside Canada's definition of child porn, good luck to you. IMO, they are covered.