What sets the male apart from the female of the species. Bacon. The male observer will look at this photo and think "Boy, I can just smell that bacon cooking. Makes me hungry. I think I will go out and get some right now and fry it up." The female will think "Bacon, gosh, it is full of fat and nitrites. Good thing I am not eating any of it. Honey, don't you think you should cut back on that stuff?" No, I don't think so, obviously, since this is getting fried up right now.