Your
teacher lied. They do exist. If heard, the answering party usually enters
Sarcasm Mode.
Also worth noting is that the person asking needs to be punched upside the
head. Hard. If he dies, it's none of your concern.
Examples of a stupid question:
(Your friend is over to visit)
Friend: Do you have a bathroom?
You: No, we
shit outside!
(You are washing your car)
Neighbor: Are you washing your car?
You: No, I'm watering it to see if it grows into a
truck!