1) The box usually has a coupon attached for more pizza. As little Caesar says, "Pizza, Pizza!"
2) Sometimes there are snarky comments printed on top. Toppers, you know who you are.
3) Any thing inside it tastes good. Just like magic.
4) You can return it and get a free pizza. O.K. that is not true. But it should be.
5) It is all warm and toasty and a great place to sit down. If you are a cat...