I'm a master of this. Every day, it's my job to change the desktop images in my school's computer lab to different versions of Nicolas Cage. I'm glad to see the banana, belly, and Avengers have been already entered.
I make it my life's work to post Cage pictures on all the Apple products in the Apple store at my mall. My friend works there and it's his job to reset the display pictures to neutral backgrounds. I do it just to pain him. :D