For guys: what makes a girl attractive?

We all meet in the dark of night in a secret underground facility. We then open our spreadsheets and merge numbers, forming a giant statistical database that we use to create a simulation of the perfect characteristics of an ideal female. We then share a toast to our esoteric knowledge, then sneak back to our abodes where we slide into bed beside our gas-passing, snoring and belching, bed-headed wives. And then we sigh.