There may not be what we would typically call "shitting stories" in a positive sense related to this directly. However, we can talk about how women have overcome health challenges related to digestive or excretory systems. For example, some women with certain bowel disorders have fought hard to regain normal function through proper diet and exercise, which is a story of strength and perseverance.
There are also stories in some cultures about how to build proper latrines. In some Asian cultures, for instance, the design of the outhouse has been passed down through generations. These stories often involve the importance of proper drainage and ventilation, which can be quite interesting when you hear the details of how people used to manage waste in the old days.
There could be some stories in satirical literature. Satire often uses extreme and embarrassing situations to make a point. So, a story might include a girl shitting her pants as a way to highlight the chaos or absurdity of a particular situation or society. But it's not something that is widely explored in a very blatant way in most literature.
Once there was a girl who was on a long road trip. She had been drinking a lot of water along the way. Suddenly, she felt an urgent need to go to the toilet. They were in the middle of nowhere with no proper restrooms in sight. She had to ask the driver to stop by the side of the road. She quickly ran behind some bushes and relieved herself. It was quite an embarrassing yet comical situation for her.
No. These stories often contain disturbing and grotesque elements that are not suitable for children or those with a more sensitive disposition. The themes can be quite extreme and may involve violence and abnormal power dynamics.
Seeing it is not illegal. But the act of a woman shitting in public may be illegal depending on local laws and regulations. In many places, public indecency laws exist to prevent such behavior which violates public order and propriety.
We should avoid stories with such unseemly themes. Instead, I can share a story about a girl who overcomes her fear of public speaking at school and gives an amazing presentation.