Don't worry. Peanut butter and pickle isn't the combination when you put peanut butter all over your privates when you own a dog. That's called something else. I think it may be called a felony. I'm not sure. It depends on the state you live in. Peanut butter and pickle sandwich sounds like it's something Elvis would have liked. He was famous for the peanut butter and banana combo (no one can knock that combo). He also died early from a heart attack, so what does he know?
I guess the saltiness of pickles with the semi-sweetness of peanut butter would work. The problem is that if it ends up tasting bad it can take a long time to chew it. You ever try to swallow peanut butter when you're disgusted? It feels like it takes a year.