Speedy Checkout OCD

Is this obsessive? I load my groceries onto the belt by category. Breads, boxes, dairy, cans, meats, produce, health and beauty...I think I started doing it because in the time it took the cadavers cashiers at Walmart to load my bags I could've started my own farm, planted crops, lived through a couple of droughts, and harvested enough food to start my own food conglomerate.