You shouldn't hide things from your coworkers.
Maria is the only person at her office that has a stapler and many of her coworkers borrow the stapler.
Maria wants to have easy access to her stapler.
Maria puts a sign next to her stapler on her desk asking her coworkers to please not take her stapler.
Maria hides her stapler in her drawer so that nobody else can use the stapler.
Maria enjoys having her coworkers come to her desk and chat while they use her stapler.
Maria feels like a bad person when her coworkers are looking for the stapler.