An army is on the move. Marching, marching, marching, day after day in the hot sun. Hot, sweaty, no rest, day after day.
The captain rounds them up to speak to them. “Today,” he says, “is a special day! Today we’re all going to change our underwear!”
Huge cheer arises from the crowd.
“Okay,” the captain says. He points. “You change with him. You change with him. You change with him . . . “