Father-son synchronous joke

This story is called watching fish eat:

Once upon a time, there was a very stingy rich man, and his family was no exception. One day at dinner, two sons filled their meals and asked their father what to eat. The father hung a salted fish on the wall and said to his sons, "Just look at this fish and have a bite of rice." The sons have no choice but to eat like this.

Suddenly, the two brothers quarreled. When the father asked why, the younger brother complained, "Just now, my younger brother took one more look at salted fish." My father was furious and said, "Let him go, you greedy bastard!" " "