What is the difference between guys flirting to girls flirting?

In a lot of circles, if a girl flirts she is a tramp and if a guy flirts, he is just being....well.......a guy. I think that is a crazy way of thinking myself. I've made it my life's work trying to find a woman who has what it take to approach me first. To me that takes courage and has nothing to do with being a tramp. I will more women would take the initiative when it comes to relationships.