Some of the best purchases I have ever made were spur of the moment. They tickled my emotional buttons enough to take the plunge and override my sensibility meters.
They may not have passed the sense test, but they sure felt good.
We've all got multiple sides to our personalities. There's our logical side that guides us to do what's "right" and makes sense: can we afford this, how does it fit into our lives, what will others think?
Then, there's our emotional side: looks tasty, I gotta have that, the world be damned.
In my experience, it's good to let both sides have their day in the marketplace.
It doesn't always have to make sense.