I would say if he is asking you should answer him. I mean isn't that what we do? If child asks a question we provide an answer. They learn that way, and you should be proud that he is asking you. Fire away with your answers, don't be shy and let him know what he wants.
Option #2? He learns it from somewhere else.
My credintials? Proud father of 17 and 18 year old daughters who surely know more then me and everyone else who walks the face of this earth. But always say, I should have listened to dad.
