I really try to teach the little ones that when they pick their nose (because they're going to do it) to go in the bathroom and put it on toilet paper. "Try" being the key word here.
Well a little 3 year old guy today is at it on my couch. I really like my couch and ask him to stop. He looks up at me and sees the baby which sparks a question from him. "Does the baby pick her nose?"
To which I answer him, "No. The baby doesn't pick her nose yet."
His very confused reply, "Well why not?"