A young couple move into a new neighborhood.
The next morning while they are eating breakfast, the young woman sees her neighbor hanging up the washing outside.
Wife: “That laundry isn’t very clean; she doesn’t know how to wash correctly
Perhaps she needs better laundry detergent.”
Her husband looks on, remaining silent.
Every time her neighbor hangs out her washing to dry, the young woman makes the same comments.
A month later, the woman is surprised to see a nice clean load of washing on the line and says to her husband:
Wife: “Look, she’s finally learned how to wash her clothes correctly
I wonder who taught her this?”