I do this every day

Me, taking a $5 out of my wallet to go to the office cafe: "Five dollars, five dollars..."

Inner fat girl: "But what if I want a cookie?"

Inner schoolmarm: "Young lady, you have about 16 fruit cups in your desk drawer, and an apple on your computer, in plain sight. You are about to go buy quesadillas from the cafe, which are SO SERIOUSLY NOT CORE. Are you really thinking about buying a cookie too?!"

Inner fat girl, hanging head and pouting: "I guess not."

[30 seconds pass, in which my hand hovers over the change pocket of my wallet and visions of cookies dance in my head]

Inner weight watcher, as I walk out of my office with only the $5: "Woohoo! I won!"

Inner child, upon discovering that the quesadilla meal includes a cookie: "Woohoo! I won!"

Inner schoolmarm and inner weight watcher: Sigh.