It is an unpleasant truth, but the original fairy tales often differ from the ones known nowadays. Most of them were NOT created for children and some plots might even seem vulgar to modern people. In our case, the story is not vulgar but there is still one interesting thing about it. In the classic fairy tale the dwarfs were nameless "seven little men" and for the first time they were named only in the Broadway Play, 1912.

More Info: en.wikipedia.org