If you have a kid who goes to kindergarten and doesn't know what a circle is, doesn't know what red and green are, and doesn't know what right and left are, by the time he learns those things, the rest of the class is far ahead of him.
From so much of this seriously-intended pornography there rises, even when it is lewdly or boisterously comic, the acrid smell, unmistakable, of self-dislike.