Remember Monster's Inc when they go into the door storage area and there are a gazillion doors on conveyor belts? Phoebe would LOVE that. She is door obsessed.
We have things hanging on almost every door in the house because Phoebe either closes herself in or out - resulting in her wailing on whatever side of the door she ends up on. She pokes her feet under and is generally pathetic. Not sure what her thing is with doors - she shuts them by standing on her back feet and using her front feet to push them, or by rubbing up against them, or by flopping down and moving the door with her back feet.
She truly cannot stand for any doors to be closed either - especially if there is someone on the other side.