So no b*st*ds will bother me.
So the cops can't bust me for carrying concealed.
So no one will see my weapon, sneak up behind me, bash me on the head, and steal my firearm and rob me with it.
Suicide by cop.
Suicide by freaked-out convenience store cashier.
To see how the sun gleams off the new finish.
All the free space under my jacket already taken up by the money belt, gps, pepper spray, taser and throwing stars.
Impress that cute gal who carries a pair of .38s
Other (please explain in comments)