text:  On average, there's going to be 20 kids coming through the door and you have to figure out how big of a slice to cut for that first kid. Well, you don't want to run out of cake because if the 35th kid comes in and there's no more cake, then they're going to go home and tell their parents that they didn't get any cake at the birthday party and you're not going to get invited to any more barbecues. So you are risk-averse. You cut a small piece of cake for that kid because you want to make sure that you don't run out. Now, what if instead...