Advertising is a funny—and difficult—business. You have to catch the customer's eye and get them interested. You have to have a compelling design. And, as these ads below show, it helps to ensure your potential customers feel familiar with the imagery.
Mmmmm. Oranges. I like to squeeze them, too.

Beer mugs are funny when shown at odd angles.

That must be some car! By the way, if you pronounce it right, "Volvo" sounds kinda...dirty.

Now that I think about it, using my computer is oddly satisfying.

Well, there's an organ that needs some Visine, quick! Or some sort of lubricant, anyway.

For some reason, I now find the idea of eating bread oddly repellent.
It's amazing what connotations arise from pictures of perfectly ordinary, everyday objects.