"Underground" Comics... or Comics That Should Be Underground?

Here it is. Direct from the brain of my nine-year-old son. The instant classic, collector's edition, "Bed, Shower, and Cheese" number 1.



You'll probably need to click on it to be able to read it. And please do.

I'm sure it's rife with hidden meaning. Or ANY meaning.

So if you understand it... can you please explain it to me???