Fads: Bumper Humor

For the American on wheels, the car bumper has now become a billboard. During election time, it advertises his political allegiance; during the offseason, as now, it is used for laughs—most of them so bad that bumper stickers may understandably raise the number of rear-end collisions before the summer is out.

MARY POPPINS IS A JUNKIE kicked off the craze. This was the brainchild of San Francisco Disk Jockey Dan Sorkin, who was fed up with the Mary Poppins cult, had 1,000 Poppins stickers run off for his friends, including Julie Andrews, who...