A beautiful motivation for portals and sutured spaces, telematically mated objects — objects that are always so that one is aware of and changes state depending on its siblings' state wherever its siblings may be in the world (thanks to tcp-ip + orc or some other network protocol).
What of there are things X that always come as a set of initially indiscernibly identical, but responsive siblings, that cannot be owned separately by just one person? What if they are designed such that N siblings are always to be adopted by N people? (Simplest case is twins.)
But more profoundly from the point of view of lived experience, the thing’s state and behavior is then sensitive to its relation not only to you / your home, but to wherever else it's homed as well. It is crucial NOT to think of these things communicating with each other — NOT transmitting data “from" one “to" the other. But instead design “the” thing so one relates to it as if it exists in more than one place simultaneously — in but also not in your home, much like a cat.
