Spanish classroom humor

OK, so one day in Spanish class my teacher is practicing our Spanish vocab with us. One of our vocab words happens to be 'pupitre' the desk, in Spanish. So my Spanish teacher asks us, "What is the desk in Spanish?" and she holds up a card with the Spanish word 'pupitre' and of course, the goof ball of the class has to stand up and say "what?! poopy tray?!"