There's really no telling when hunger will strike.
Sometimes we find ourselves caught in the worst situations possible with a rumbling tummy and no feasible way of giving it what it wants - during an exam, while stuck in traffic, etc.
Other times, though, we're blessed with the opportunity to feed ourselves right when we're feeling our absolute hungriest. Sitting in a McDonald's parking lot sounds like an ideal time to start feeling particularly snackish, even if that's right after you've just given birth to a baby.