Why is it so hard for many men to approach a beautiful woman? The simple answer is fear. They care too much what she thinks. Usually when you spot a woman you're attracted to you only get that one chance. Most men don't take it though. Then they think about it for the rest of the day. "If only I had said Hi". And it is that simple. Not knowing what could had possibly happened if they had just took a chance will bother them forever. Its a burning question.
So what happens that moment when indecesion takes over or why does it happen? It's called playing it safe. People like to stay in they're comfort zones and anything that pushes their boundries causes fear. It's the exact same reason why 95% of the population is poor. It's funny that some of the best moments in life are when someone comes out of their comfort zone.
On the other hand you these men(about 5%) who do swing at every pitch they see. They get laid and they also get turned down. It's no big deal though. When they see something they want they simply go for it. You can't attract every woman you see for they all like different type of men, but you can try. In the end you shall conquer your mind or your mind shall conquer you. Listen to that voice in your head and know that you can chose what to believe!