What is the fascination with auto-correct humor?

I know of a guy that got ahold of his boss’s Blackberry and made it autocorrect “lol” to “Let’s go to the quarry and throw shit down there.” So he’d get texts like “Can you come here? I want to show you this Let’s go to the quarry and throw shit down there.” and eventually, my favorite:

“Let’s go to the quarry and throw shit down there. Something’s wrong with my phone Let’s go to the quarry and throw shit down there.Let’s go to the quarry and throw shit down there.”