It goes without saying that in one of our favorite books, now movie, Gone Girl, Amy Elliot Dunne is fully aware of how to play a "cool girl". What is a "cool girl" you ask? Well, in its simplest form a "cool girl" is a guys-girl, the girl whose boyfriends friends all say, "dude she's the best!".
"Cool girls" are the ones who look perfect at all times, even after "rolling out of bed". They drink hard liquor and beer and never get sloppy drunk. They can talk sports all night and laugh at dirty jokes. All guys want a "cool girl". And... why wouldn't they? "Cool girls" are basically dudes that are attractive, have boobs, and are down for absolutely anything in the bedroom. "Cool girls" always get the guy. The thing guys don't realize is that this "cool girl" does not exist. No girl is entirely this cool, she is simply a role well played.