honestly - the higher the fat and calorie in foods, your brain registers them as very efficient at providing energy. This then creates a memory in your brain that these are the best foods to eat to pile in as many calories as possible so you crave them. Hence things like fat, bread and butter, puddings etc, all very calorie dense but memory retained as "good food"
Do not miss your packs Mia, you risk doing more damage that way than the handful of peanuts would. Just try and stay on track for the rest of the week. Don't overdo it on the DVD's either just try and relax.