The better explanation for Peter breaking the fourth wall is that Disney made a show a few years ago called the Weekenders. the main character, Tino, would break the fourth wall to explain the situation and tell jokes. Obviously Disney wanted another character like that, so they made Spider-Man, a goofy character who sometimes breaks the fourth wall (not often though), like Tino.
If I recall correctly, wasn't that show a bomb because it was a colossal, steaming, worthless pile of bull****?
Hey, you're right, it does bear a striking resemblance to the Ultimate Spider-Man cartoon.