From the back cover “A fat slacker with bad skin, Charlie .... lives off the kindness—and financial contributions—of his family and spends his time compiling lists of personal rules, daydreaming about becoming a rock star, and scheming his way into bed with as many women as possible.”
Most of the women he pursues are unattainable. He relies on an old test for compatibility his aunt tells him about – If you like the smell of the woman's neck you are a good match.
