Here's a new plot idea I've had for a story which I will no doubt try to flesh out when the opportunity presents it's self:

Anyone who has ever watched engaged in the ancient hobby of Cat watching must have at some point pondered the possibility that cats tails are in fact not part of the cat but an independent alien being that has grafted it's self on to the back of the cat and is secretly planning to take over the world (Along with all it's tail brothers (and sisters) of course. Well it's true. That's why Manx cats have no tails, The aliens simply can't think of any practical use for the Isle of Man.

The tails are just waiting for the arrival of the Tail Queen. A far bigger tail that needs a far bigger host (Preferably with opposable thumbs). Consequently when the tail queen comes to earth she homes in on a cute 18 year student. Unfortunately for the tail race they discover that unlike cats they can not entirely take over the mind of human subjects being as we are just to damn weird and the Tail queen ends up under her control. But they can control her just enough that she now has an over whelming desire to take over the world and the ability to command her tail subjects (and their cats) who will follow her every whim blindly and with out question. However The student in question (named Alison) is a really nice person she is constantly distracted from her quest to become supreme ruler of the world by her desire to help people in trouble.

She may in the end despite all her cunning schemes become ruler of the world by being nice to so many people that eventually everyone thinks she should be.