Why Did I Do This?

Last week, I impulsively bought a box of my favorite candy and hid it in the pantry. But now, every time I pass by, I feel this overwhelming urge to eat just one piece, knowing full well how unhealthy it is for me. It's strange; why would something so enjoyable create such stress? Am I really that weak-willed? What am I supposed to do with this box of temptation sitting in my home? Anyone else have tips or similar experiences?