These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Family-Unfriendly Aesop: (Values Dissonance ?) In one episode, Shelly is trying to impress Holling, by learning about the time of his youth, and trying to hold an intelligent conversation. Holling is bewildered by this turn of events, and eventually tells her she doesn't have to do this, since he only likes her for her body. This is played as a Crowning Moment of Heartwarming.
It's not meant to be taken at face value. It's obvious through Holling's actions that he cares deeply for Shelly; he'd just rather have sex with her than have long conversations.
It could also be a Spoof Aesop. Remember that this show has a habit of turning stereotypes and cliches inside out, and that this is often Played for Laughs.
Sensible character interpretation is that Holling just wants to take the pressure off her. This leaves us with Shelly still being The Ditz, but it's not put through in a mean way.
The Woobie: Poor, poor Ed. Few things ever seem to go right for him, and when they do, they don't seem to last long. Yet he takes almost all of it in stride, even when characters like Maurice are insulting him to his face.