The excerpt discusses a light-hearted view on the social dynamics of sitting in someone else's chair. Generally, chairs are considered public property in shared spaces, where respect for ownership only needs to be observed when the owner is present. When alone, one can feel free to occupy any chair, which highlights the playful and informal nature of shared environments.
However, the text does draw a line at certain types of chairs, particularly those belonging to very important figures, such as a monarch's throne. The idea of sitting in such a revered seat when left unattended is presented as an audacious act, one that many might be tempted to try, despite the implications of overstepping boundaries. This fosters a humorous contemplation on the allure of authority and status.