I didn't discover SICP until after I had graduated from a good CS school. Its clear and away the best programming book I've ever read, even for an experienced developer.
Catering to the things that 18-year-olds want has never really gotten us far in society.
Don't worry if the last few parts don't make too much sense.. I went back and forth between the two quite a lot
Maybe the humor was just lost on me...