When I was a kid I was obsessed with peanut butter. I'd go to my friends' houses and eat it straight out of the jar when I thought they weren't looking. I shoplifted Reese's cups and dreamed about Butterfingers. It wasn't because I had an actual addition - it was just because my sister was (and maybe still is?) deathly allergic to peanuts. It was a pretty early discovery for my household, but not early enough for me to forget the sumptuous joy of bread slathered in rich and creamy peanut butter…