Now if this article is going to sound cocky and probably even a bit chauvinistic, my apologies. Simply because that's what this subject is all about!
Most guys believe that it is very difficult to get a girl to have sex with them, and then there are a couple of who believe they can have sex with any girl on the planet. The reality is that each these 'types' are totally disillusioned about the fairer sex. Those who think girls are tough to get are underestimating themselves and placing an nearly sacred tag on girls. Girls, following all, are human and they have their requirements too. Those who think girls are simple are plain stupid. The middle path is what works here.
The fact is that no girl is as well tough or too simple. It just depends on what you are and how you approach them.
Did you know that if you approach a girl, she tends to make up her thoughts in about 15 seconds whether she will ever have sex with you? Yes, that's precisely what it requires. 15 seconds. They don't appear at just your physique or your garments or the way you speak but they look at the whole 'you'. They appear at you as a person. The thing that goes in their minds is-"Will I be in a position to tell my buddies about this adventure with pride?"
True, for girls it is more about feeling great about a specific encounter and then being in a position to inform their friends about it. If they really feel good about you, they will be more forthcoming when you propose them to have a night with you.
So, work on your personality, and then on your method. If you are only looking at how to get a girl to have sex with you, this is all that you will need. Also, be yourself, don't imitate others illogically. Each man is defined by his own style and that's what ladies like.