You guys are totally overthinking this.

Fine, I'm game.
Unlike some other cultures, the traditional American diet has many things that are sweet+salty(+fatty, usually). Snickers bars, french fries & ketchup, chocolate chip cookies, hotcakes & sausage, etc. PBJ is an excellent example of that, plus it has a very smooth mouth feel. The whole sandwich, if made properly, is a uniformly satisfying room-temperature experience - sweet, salty, doughy, and a hint of tart in every single bite. Maybe a bit bland, actually, but just right when you're in the mood for it.Socko's like that, not thrillingly beautiful, yet completely satisfying to behold. She looks exactly the way she's supposed to look.