"If you want to get into someone's house, what do you do? Well, if you are like most people, you simply go to the front door and knock, or perhaps you give them a call first. Then, someone comes to the door, opens it, and lets you come inside. But what if you were a rodent? Have you ever opened your front door to find a rat or mouse sitting on your doorstep asking to come in? No. That would be…"