Rod Stewart famously crooned, "Every picture tells a story..." While he wasn't singing about photography, his lyrics certainly apply.
With photo-journalism and editorial photography, the "every picture tells a story" notion is easy to understand and makes perfect sense. As we all know, it's often applied and we see it played out in so many ways and in so many images of those types.
With other genres, the "story" can be a bit less obvious: It might be subtle and barely perceptible. Or, it might be the same story over and over: "She's hot and she's turned-on and she's all about sex!" (I shoot that "story" often enough.) READ MORE?
(Link has NSFW pic)