After spending my childhood in Germany and then moving to America part of the culture shock was in the way that fairy tales are related to the public. Believe me when I say that Americans have "cleaned up" the Grimm Brothers tales. The more Disneyesque versions only resemble the original tales.
The two brothers did not originate their stories they collected folk tales from the peasants and made them popular to the more educated people of their time. If you read them in German or can get a book with a literal translation you can see that these stories were meant for young adults much like the horror movies of our time. Many were morality tales meant to warn young women from people who would do them wrong.