Ultimately, almost all guys learn this truth for themselves: The best way to never score with a woman is to show too much interest in her.
Women seem to especially like it if you are more devoted to your bad music, biker gang, forearm tattoo or marijuana. These all seem to work wonders. There are some interests you can show in a woman that will help you to fuck her: a healthy interest in destroying her self-esteem and in fucking her friends more than her seem to work wonders. Note that the following topics of disinterest have been field tested and shown conclusively not to work: Unix, literature, poetry, international politics, and sodomy.
Novelty - Let's face it, if you're like every other guy who works a normal job and tries to live a good life, you're probably like just about every other guy. Chicks don't dig this, and why would they? Who wants someone who is just like everyone else? Something different is more attractive. Like someone who does not have to work during the day like most people because they have lots of money from business or selling drugs. Or like someone who has stabbed a man and went to prison for it. Different and a veritable ticket to getting laid.