1. In morning meeting, your boss mentions popcorn and chocolate and you immediately start picking out your beverage of choice (Coke) to accompany this snack that is not before you as matter but is very much in your head now that your boss has mentioned it.
2. In same morning meeting, your boss mentions pizza and you think, "YESSS!!"
3. Immediately following lunch, you come back to your desk and start eating Chex mix.
4. While eating Chex Mix, you see the Cinnamon Toast Crunch on your desk and think, "YESSS!!"
Just a hunch, but I think there could be hormones behind this.