Who has a joke about "soft"

In Chinese class, the teacher writes "soft" on the blackboard and then lets everyone spell it. The boy shouted, it's too soft. The teacher said: boys' pronunciation is not standard, please ask girls to supplement it. The girls all shouted: It's my day-soft. The monitor corrected: five nights a day-soft sleeper. The teacher was impatient and corrected sharply: the correct spelling should be-I was soft on Friday night.