The Madam’s house
A madam set up her business in a three-floor house. She wanted to have a specific theme for each floor, so she hired ex-secretaries on the first floor because of their efficiency, ex-models on the second floor for their beauty, and ex-school teachers on the third floor for their intelligence. To her surprise, she found that most of her clients preferred the third floor. She asked one of them why he always went to the third floor, and he said, “because those ex-school teachers always make you do it over and over until you get it right!”