Nastiness Curve

Wanting to get with a chick who is younger than you?
Use the nastiness curve: Take your own age, half it and then add seven. Your answer shows the minimum age of how old a chick can be for you to get with her.

Person 1: "I want to get with this hot younger chick but I don't know whether it is correct or not"
Person 2: "Use the nastiness curve"
Person 1: "I am 18 years old, half of that is 9. 9 + 7 = 16"
Person 2: "If she's 16 or older you'll be just fine"