>>5780180Well, there is the question of why he painted this, but doesn't look at porn. It's farfetched, but it's possible he isn't drawing this to masturbate to, and even that it doesn't arouse him at all (like his mistakes bother him too much to be aroused by his drawing). But that if he did look at porn he would be tempted to masturbate, which is why he doesn't use it as a reference.
