Also, as we're not married, our own things are just that - our own.
You've got to admit, you do decide this pretty randomly, though. I mean, I'm assuming you don't have separate fridges, ovens, dishes, and couches. So you're definitely willing to share some things, but not others. There's nothing wrong with that. I'm just saying it's a bit simplistic to say the reason you have two computers is because you're not married. It would be a bit more accurate to say you have two computers because you each like having your own computer; I don't really expect you'd change that whether you were married or not. :^)