Chico I don't think this was addressed a few pages ago: Do you use a third knife to cut your PB&J?
I must have missed what this is referring to... but...
I don't think I have made a PB&J in years, in fact, I doubt that I even own jelly, but if I wear to make one, I'd have to wipe off the knife in order to make a clean cut. I can't have remnants of the innards on top of the bread. That would be horrendous. Also please note that said sandwich would have its ingredients perfectly spread to all edges in uniform thickness.
a diagonally cut sandwich from a square loaf is a beautiful thing. It's how all of my grilled cheeses are cut.
Now, other breads such as hoagie rolls, focaccia and wide loaves don't lend themselves to being cut diagonally.
Lastly, I am developing an aversion to peanut butter. about 75% of the time if I eat it I get chest tightness. No breathing trouble, just an uncomfortable sensation. Every so often if I eat a small spoonful, or a Reeses cup, I'm OK. just no peanut butter sammies for me.