[nextaccountic]

Something like Hibernate in Java will fetch data from the database once, populate objects (potentially making cycles and complex relationships between Java objects), and then let your business logic deal with those long-running, persistent Java objects (as opposed to objects that you deallocate right after being done with then after you queried the database)

This means that if you ever happen to use this object again in another context without making a new query, you risk dealing with stale data. And this happens all the time, because querying the db is seen as "expensive" and reusing model objects is "cheap"