> > Nope. If the peanut butter is on top, then the peanut butter bread sticks briefly to the roof of my mouth, moving the peanut butter nicely onto my tongue while the jelly moves opposite, to stick behind the bread. How do you get the peanut butter on your tongue when it is facing downward?
>
> "Facing" doesn't exactly count, since the sandwich is assembled when you put it into your mouth.
>
> If the peanut butter is above the jelly, it has to get through one layer of bread to get to the roof of your mouth, and one layer of bread PLUS the jelly to get to your tongue.
>
> If it's below the jelly, then the reverse is true, and it's easier for the peanut butter to get to your tongue than the roof of your mouth.

I sometimes put the peanut butter on the outside of the bread, both sides, because I happen to like peanut butter sticking to the roof of my mouth. Tongue, too.
Howard