I guess, there is a malicious guy who wants to ruin your luck and find a bird monk. Bird monk was eager to make money, and in order to go back and get the reward, he came up with this method politely.
A cultural interpretation: During the Opium War, in order to defeat foreigners, the Qing government collected women's menstruation and scattered it to the places invaded by the enemy, hoping to bring bad luck to foreigners. What was the result? Needless to say. It can be seen that in the competition, the party without strength often adopts the method of losing. It is more self-defeating than offensive; Predicting failure is better than predicting success.