Writing in a diary is a strange experience primarily because it is often a new practice for many people, including Anne Frank, who had never written anything like this before. It feels unusual to write down personal thoughts and feelings for oneself without expecting others to read them. Additionally, treating a diary as a confidant or friend, to whom one reveals inner emotions and secrets, adds to the strangeness because it involves confiding in an inanimate object. In Anne Frank's case, she also felt that no one would be interested in the musings of a thirteen-year-old girl, making the experience feel even more peculiar. Moreover, the diary serves as a patient listener when no real person is available to share feelings with, deepening the unique nature of diary writing as a strange yet comforting experience.