I'm not hip to most of the minor characters and plot arcs after, say, the 1980s, so when I read a more recent comic that involves them I just coast along vaguely and trust that it makes sense in context. This one involved some established love interest of Ethel's:

"Haha," I thought to myself. "That's pretty funny, I guess this guy's Main Character Trait is that he's really dumb, or maybe he never takes off his sunglasses. Either way, I like this self-deprecating humour."
And then you know what I realized?
HE'S BLIND!!!!!!!!!!!!!!!!!!!
Wow! You'd think that if the sunglasses didn't give it away, the really obvious SEEING-EYE DOG would have! I'm just too open-minded about accessorizing apparently. (or dumb)