Why is it

that you never run out of two essential ingredients at the same time? Or always have to go to the store because you have one thing and not the other? I've noticed this happens frequently with shrimp and cocktail sauce, bagels and cream cheese, or tortilla chips and salsa. I'm thinking it's some sort of cosmic joke - "so you want a bagel with cream cheese, eh? Well, you don't have any cream cheese. Bwahahhahaha!!"