I think the main reason I (and you guys) don't have sex is simply that we don't get ourselves out there as much to eventually make it happen. If you don't have any friends or anything resembling a social circle then there is no way you are going to meet enough girls in a natural, organic way so you end up having sex with one of them. And if you have no friends and you're not used to social interaction there's no way you're going to be able to cold approach girls and talk to them without stuttering like a damn retard.
Most "game" advice is real and it works, but it is written under the assumption that you are a normal, somewhat social person that is used to talking with other human beings. If that is not your case then you're wasting your time with that. I'd rather focus on making friends first or else try online dating (which is a skill on itself).
https://www.youtube.com/watch?v=0U014h_JT24 