It's bad to be careless with your possessions.
Val is at the skating rink and has a purse with her she can't bring onto the ice.
Val wants to put her purse somewhere.
Val rents a locker and puts her purse in the locker.
Val puts her purse on an open bench.
Val's purse is secure in the locker.
Val's purse can be stolen by someone at the rink.