What's the point of owning multiple versions of the same console?

[cloud1161]

Why do some people have multiple 360's or PS3's under the same roof?   Is it so you don't have to move it from room to room?  Is it so you don't have to share with a sibling or even a parent?  I really don't see why even these two reasons would justify purchasing the same console.   Maybe I just don't see the point because I never had much money and value owning just a single console per generation.   I am really not trying to be an ass.  I am genuinely curious.