One letter that makes the difference

When I returned from my shopping tour on early Saturday morning (around 10.30 a.m.) the U-Bahn-Station Marienplatz was already closed due to the visit of the pope that AFTERNOON. So, I had to walk to Sendlinger Tor to drive back home. On my way, I saw a child, picking its nose. Then, I was thinking what difference only one letter in a word could cause: A Popel (bogey) is something that plugs your nose, whereas a Pope is something that plugs the subway, the streets and, at least,the brain of some people. I can prove it! Thanks to Spiegel Online!