Stanley/Headscratchers

Take a look at any character in this series who wears glasses and then stop for a moment. How do they stay on their face? The characters are drawn in such a way that the characters' ears are well below eye-level, so that the earbuds of the glasses rest well above their ears. Still, even if you ignore this (and, after all, it's also the case with Arthur, though with his, the buds rest below the ears), there's still the fact that the glasses don't have any bridge in the middle! This gives them the appearance of being two independent parts, somehow resting separately on the characters' faces.
- It's the animation style, and I doubt the show's target audience would care.
Are the Book's mechanics & workings ever explained?
Just what is Lionel listening to on those headphones of his? And why don't Mr. and Mrs. Griff ask to at least take them off for mealtimes?
Why haven't any of these questions been answered?
- Well, one of them has been answered...
  - Plus this one! Yay!