Dekker, the point is not whether or not someone likes to watch images of nekkid person that "appears to be" underage. The point is this:
-"or appears to be" is something that totally does not belong to any legislation. It's ambiguous, free to interpretation and bad for the credibility of the law.
-chest size is not a reliable measure of age.
-the point of anti-cp legislation is to protect underage people from abuse. If someone looks like they're fifteen when they're twenty-two, that shouldn't be a problem for them to pursue their career of choice (much as I would want to disagree with the integrity of said career, but that is irrelevant). Even less irrelevant is how someone perceives the imagery of said person.
I could think of more points why this is not exactly my idea of good legislation, but these I believe are the most glaringly obvious.
EDIT: As Kyon points out;
