A newly married couple moves into a new neighborhood and every morning at breakfast, the new wife would observe the lady next door who was hanging out her laundry.
“Look at her sheets! Just look at them! Aren’t they dirty? She should wash them better.”
The guy looks but says nothing.
Next morning, this continues.
“I wonder who taught her how to wash. Those bed sheets are really messy and a grey-ish color.”
The husband says nothing.
This goes on day after day until one morning she exclaims:
“What could have happened? The sheets are so clean now! Sparkly white!”
The guy sourly replies:
“I washed the windows.”