I think the most common relationships are like shoeboxes. They best work when each person puts in a shoe of similar size and weight. Also, both shoes should fit in the box. Personally I have lots of shoeboxes and it works out pretty well by recognizing that.

Things change though when you decide to move a refrigerator. Maybe you start putting your condiments in there, a jar of pickles, tub of yogurt. If one person dominates all the tall items section like with milk, ketchup, juice cartons, it could crowd the other out, or it could be perfectly fine. Depending on the capacity of space, and nature of people. Again, just having the door close keeps the relationship happy.

You can move to the closet where jackets can go, maybe some space for some baggage, or odd things like a skeleton, or pet cougar.

Eventually, maybe with the special person, you just share a house, and all your crap goes in there and it all fits and this game is just over.

However, it breaks down when you have to go backwards. If you have already put a few items in the fridge, where do they go in the shoe box. Do you not put shoes in there any more? What happens to the big jug of milk? Its going to go bad, and its gross.

I think the only way to go backwards is if everything in the fridge got eaten and you dont need it anymore. Perhaps there are other boxes to store your luggage. Cause otherwise leaving stuff outside the box, I’d say is worse than having no box in the first place.