Does anyone know why Audrey kept her perfum in a mail box in?

movie 'breakfast at tiffany's'?





it's weird. why didn't she keep it on a dressing table or drawer in her room.Does anyone know why Audrey kept her perfum in a mail box in?
I just watched that movie yesterday and I think it was to show her funny attitude about life in general but I dont think there was a specific reason.Does anyone know why Audrey kept her perfum in a mail box in?
craziness
P.S Just a note nothing to do with question,she was a kind charitable woman
It made the envelopes smell good. Or Holly Go Lightly as she was known as the character depicted by Truman Capote was a bit off and she had many men dates if you know what I mean so maybe it was a signal to her would be lovers or that the china man would keep letting her get off on her rent.
so hubby could not use it
To have the mail with a good perfum smell.