Only a few people know, that in the house in which Snow White was living with the seven dwarfs, there was also a huge swimming pool. And since it was one of the duties to keep the house clean, it was also her duty to keep the pool nice and clean.
To her bad luck (but for our viewing pleasure) Snow White was really really clumsy. So each time she tried to clean the pool she fell in with a big splash and of course always with her nicest little dress.