господа,все мы в зеркале славные..
A gentleman was much surprised when a good-looking young lady greeted him by saying "Good evening". He couldn't remember ever seeing her before. She evidently realized that she had made a mistake, for she apologized, and explained: "Oh, I am sorry. When I first saw you I thought you were the father of my two children." She walked on while the man stared after her. She didn't realize, of course, that he was unaware of the fact that she was a school teacher.