(Strip Number 1406, Original Publication Number, 14 January 1988)
Panel 1: We find John rooting through the closet and asking if anyone's seen his tweed cap.
Panel 2: He's angered when Lizzie narcs on Mike for taking it outside.
Panel 3: When he angrily yanks it off a snowman that's holding a copy of the New Yorker, Mike explains that he ans Lawrence are making a yuppie snowman.
Panel 4: Mike ascribes John's foul temper to their breaking from tradition.
Summary: Actually, it's Mike and the others touching his stuff that bothers him. He gets just as angry when his kids get too near to his stupid-ass toy trains for the same annoying reason.