I was playing a gig last week, filling in with a band. They kept themselves amused onstage by pulling up midget porn on their ipad screens while they played.
The audience can't see it, but everyone onstage can. It was a great laugh, seeing Bridget the Midget getting plowed while playing soulful minor blues leads over that C F chord progression of "Can't always get what you want". Lots of fun!