A boy is told by a classmate that every adult
has at least one big secret and that it is easy to
blackmail them by saying: I know the whole
truth. When the boy comes home he decides to test
this, so he goes to his mother and says: I
know the whole truth.
The mother gives him $20 and says: Take this
and go just don’t tell your father anything.
Next, the boy goes to his father and says: I know the whole truth.
The father gives his son $40 and says: Take
this and go just don’t tell your mother anything.
The next day on the way to school the boy
sees the mailman and says to him: I know the
whole truth. The mailman responds: Then come give your
daddy a big hug!