It is rude to be dishonest about your contact information.
Marsha is out clubbing when a guy named Jacques asks her for her number.
Marsha wants to avoid giving Jacques her phone number.
Marsha tells Jacques that she isn't comfortable with giving her phone number out to strangers.
Marsha gives Jacques the number to a local fast food place, telling him that it is hers.
Jacques accepts Marsha's answer and leaves her alone.
Jacques calls the number and feels rejected when he realizes what has happened.