Для разумеющих натовский език.
Vovochka is the Russian equivalent of Little Johnny. He interacts with his school teacher, Marivanna, a spoken shortened form of Maria Ivanovna, a stereotypical Russian female teacher's name. "Vovochka" is a diminutive form of Vladimir, creating the "little boy" effect. His fellow students bear similarly diminutive names. This "little boy" name is used in contrast with Vovochka's wisecracking, adult, often obscene statements.
In biology class, the teacher draws a cucumber on the blackboard: "Children, could someone tell me what is this?" Vovochka raises his hand: "It's a dick, Marivanna!" Maria Ivanovna bursts into tears and runs out. In a minute the principal rushes in: "All right, what did you do now? It's something new every day! Yesterday you broke a window, and today...," he looks around, "...and today you draw a dick on the blackboard?"