Spoiler alert (

) - I might offend some . .
Maybe Sigmund Freud could have explained the desire for such appendages.
Spoilers can sometimes look OK . Unlike swollen lips and pouts like a cod fish by using Botox.

.
Maybe a discrete spoiler may improve airflow and stop the rear window getting so dirty.
To continue off topic on this vein. I recently noticed that many recent cars now have small fins styled into the bottom rear edge of the rear wheel arch that disperses airflow outwards . Not mudflaps as such. Presumably so airflow along the sides of the car is less likely to form a vortex of dirty rainwater at the rear. Some cars have them pre styled into the rear bumper assembly while others have them as part of a plastic wheel arch trim. The Jazz would benefit from them I think.