Students are in Spanish class.
Student: Mr._______, can I go to the bathroom?
Teacher: Yes, but you have to ask that question in Spanish since we're in Spanish class.
Student: Okay, ¿Vamos al baƱo? (means, "Let's go to the bathroom" or "Can you and I go to the bathroom?").
Teacher: umm well, I'm not going with you...
Class starts cracking up
Student: wait, what?