That's all your house is- a place to keep your stuff. If you didn't have so much stuff, you wouldn't need a house. You could just walk around all the time.

A house is just a pile of stuff with a cover on it. You can see that when you're taking off in an airplane.
You look down, you see everybody's got a little pile of stuff. All the little piles of stuff.

And when you leave your house, you gotta lock it up. Wouldn't want somebody to come by and take some of your stuff. They always take the good stuff. They never bother with that crap you're saving. All they want is the shiny stuff.

That's what your house is, a place to keep your stuff while you go out and get...more stuff! Sometimes you gotta move, gotta get a bigger house. Why? No room for your stuff anymore."