The "boss" just came over and changed a desktop on a computer to a half naked whore bending over a car. WTF, how professional is that?
Come on, no one wants to see a pic of some whore on your desktop everyday. At home, that is fine... but this is a workplace! I dont care to see what "gets you off" on your own time.
I can understand perhaps your kids, or a car, a bike, a hobby oriented thing but serously....
Think before you press the "set as desktop" button.