I have a Peanut Butter and Jelly most days for lunch at work. Adam's Peanut Butter. Smucker's Raspberry. I get the occasional "do you have a PB&J _every_ day?" when I'm in the snack room. No, no I don't have one every day. But it is my default lunch.
So today:
Her: "Why do you have a PB&J every day?"
Me: "Why do folks stay married for 20 years?"
Her: "

That's not the same thing. You're dealing with another person."
Me: "Yea, with a PB&J, I know what I'm getting every single time."

Carl