My mind was wandering at dinner again tonight.
I have a possession that I deem to be yours whenever you want it and mine whenever you do not. This possession that I occasionally possess does not itself possess any particularly striking qualities that would appeal to anyone in particular, both in appearance and functionality, HOWEVER, what makes this possession very much desirable is that what decides its ownership is conscious desire.
To whom does it belong to then? You.
Unless of course, it's in my possession. In which case it's still yours.