Yes, there's one you might like. It's not NSFW, but I would call a few of the photos slightly suggestive. So if you work at the Vatican, you know what to do.
Photobombers: Ruining Your Pictures, One Click at a Time
"Although often photographed, his kind remains a mystery. Who is this random man? Where did he come from, and what are his motivations? One golden moment of genius and then, in a flash, he's gone. Wonder at his antics in this gallery of great photobomber moments."