Blood circulates through the body by flowing down one leg and up the other. A monsoon is a French gentleman. Rain is saved up in cloud banks. To keep milk from turning sour, keep it in the cow. Genetics explains why you look like your father, and if you don't, why you should.
Water vapor gets together in a big cloud.
When it gets big enough to be called a drop, it does. There is a tremendous weight pushing down on the center of the Earth because so many people are stomping around there these days. The cause of perfume disappearing is evaporation. Evaporation gets blamed for a lot of things people forget to put the top on. You can listen to thunder and tell how close you came to getting hit.