What is the reason why bird droppings fall on clothes in geomantic omen?

Strictly speaking, this question is wrong. Bird droppings falling on your body do not belong to the category of geomantic omen, but I understand what the landlord means. Bird droppings fall on clothes, and there are superstitions in some places, which will lead to three years of bad luck or even decline. On the contrary, some places think that there will be unexpected gains, so no matter what kind of statement, it means that something or something unexpected will happen to this person in the near future; From the perspective of dream interpretation, shit represents wealth, and wealth falls on you. However, "there are guests in the dream, and there is no furnace to cast a windfall." Unexpected wealth is unexpected, and unfair money will bring anxiety.