I heard it this way: In the
I heard it this way: In the old days when people had daub and wattle houses with thatched roofs, many critters would live in the layer upon layer of roofing materials. Even larger animals like dogs and cats would bed down there. In very heavy rains, if you weren't diligent to keep the unwelcome residents away, they would begin to come through the thatching to the inside. If the rains were heavy enough, the roof could break under the pressure of a cat or dog, and all would fall into the house: rain, cats and dogs. Along with that, I read that the canopy bed was invented for that reason as well. Who wants "thatch dwellers" falling out of the ceiling on you while you're sleeping?