A young married couple moved into a small neighborhood, the girl used to always sit in front of the window to watch the street and the neighborhood. One day she notices that her neighbor had washed the sheets and when she saw her husband, she told him "What dirty sheets the neighbor has, I cannot believe she washed them". Upon hearing this, her husband was silent and said nothing.
So, several months passed, each time the neighbor washed the woman to the same comment about how dirty the sheets were even when I washed them. But one day something different happened, when she sat down and saw the sheets she realized that they were not dirty this time and relieved she said "She finally learned to wash our neighbor" to which her husband responded quickly "Not my love, today clean the window, what you saw was not dirt on your sheets, but dirt on our windows "