Blondie

Elmo and Dagwood are sharing a pizza.
"Think about it, Mr. B. ..." says Elmo, "you've got your round pizzas, your square pizzas, and even your rectangular pizzas... don't you think a star-shaped pizza would be something really special?"
Dagwood lowers the slice of pizza from his mouth and looks at Elmo in shock, his eyes suddenly opened to the possibilities.

Some time later, Dagwood and Blondie are sitting in their living-room. The television is on, but neither is watching it.
"A penny for your thoughts, sweetheart" says Blondie.
Dagwood stares vacantly into space. The concept of star-shaped pizzas has shattered his world-view, his very grasp on reality.

Comic