When I was a kid I used to love peanutbutter and marshmallow sandwiches. But then, when I was a kid I could consume enough sugar in one day to crystalize an ant colony.
Yeah, it's unhealthy. Anything that sticky and gooey has GOT to be bad for you
The PB and bananas suggestion is a good one - tastes great and not bad for you. Also try peanut butter on apple slices. Very good.