Smurfette was magically created from clay by the Smurfs' enemy, Gargamel, so that she would use her charms to cause jealousy and competition among the Smurfs in order to cause their fall. He left her in the forest and Hefty Smurf took her to the Smurf village, where she was kept out of kindness.
Gargamel's plans didn't work well at first, as her appearance was flawed. He had designed her in such a way that she might be attractive to a sad and despicable person like himself, but to the Smurfs she looked like just a male Smurf but with long spiky black hair and a dress. She tried to be feminine and considerate, but was unattractive and proved to be more annoying than seductive.
Frustrated, the Smurfs got back at her by making her think that she had put on weight and was becoming fat, thus causing her to fall into a state of depression. Papa Smurf took pity on her and took her to his laboratory, where they locked themselves in for several days before emerging. Smurfette now had long, flowing blond hair and an appealing character. This caused every Smurf of the village to fall in love with her.
"One schoolboy in about the year 900 found this page in the back of a book. He practiced for a bit with his lettering, making musical symbols above some letters since he was also being taught to sing at services. Then he got bored and did a bit of writing backwards. At some point he decided it was more fun drawing the monastery cat apparently chasing the monastery dog, and even a sketch of one of his classmates of perhaps himself."