Twilight, being the bookworm she is, decides to take up her own studies aside from those Princess Celestia assigns her. She decides to study up on sexual fetishes and sexual conduct in mares. When she decides her friends are the perfect test subjects for her different, gruesome experiments, she feels justified in the horrible actions she is doing on her friends. They plead with her, but to no avail. Twilight cracks, and continues her experiments much to the dismay of her friends.