One day when my smart cookie was in the office for some offense or another, I stood behind my principal and listened to her talk. At one point in the conversation she said,
"Don't cry! You did this."
A light bulb went off in my smart cookie's head. Keeping her eyes on my principal she licked her index finger, brought it just underneath her eyes, and drew a line of saliva down her check. Then she meticulously repeated the same action on the other side of her face. Following this she rubbed her cheeks with her hands to make them red.
"What do you have to say for yourself?" my principal asked.
"Excuse me." my smart cookie said, "Don't you notice my cheeks are red?"
I had to leave the room so that I wouldn't start laughing. Smart little thing.