Yes, we do that sometimes. But our exchange usually goes like this:

Person A: I want this! We should totally have this!
Person B: Yes! But where would we put it?
A: Somewhere totally impractical and funny.
B: Yeah, I can see that! Particularly if we escalate the impractical and funny!
A: It would be great!
B: Totally... but then this totally practical and predictable problem would happen.
A: Yeah, too bad.
B: Yeah, too bad.
*wander away*

Repeat script for everything from "immense concrete rhinoceros statue" to "six baby ferrets at the pet store."