Your OMENTUM is like the stomach's outdoor parking lot. Normally there are four double rows to this parking lot. Your Omentum's job is to temporarily park fat for energy when it senses you have elevated stress levels. It interprets that to mean that the tiger is lurking near and if you need to make a break for it, it will park fat right here in the lot right outside the stomach to draw from for immediate energy (rather than that far away stored fat on your thighs) and it will use that to provide you the fuel you will need to get away.
So under constant stress, it never clears the parking lot. It keeps storing more fat in the lot (building