There are two kinds of people in this world. There are the folks who, upon seeing you, blurt, "What happened to your nose?" And there are those who, upon seeing you, WANT to blurt, "What happened to your nose?" but are far too polite. Or repressed.
If you catch a child with a finger up his nose, you probably discourage it. But could the "nasty" habit of nose-picking -- and eating it -- be more sanitary and even health-beneficial than we've been taught?