I've always seen it as more about having control over a guy/relationship in general than plain out sex. She sees through the bullshit. You can't trick her with the lies anymore because she has been there quite a few times and already knows how most people put up a front to get what they want. Saying she's not a "virgin" is to say that when you're naive, you can get tricked into a lot of things because you're inexperienced. She's saying if you're going to try playing any games with her, it's going to be like playing with fire because she's not a "virgin" anymore and knows the shit some people make up to emotionally and physically screw with a person.
I've always seen it as more about having control over a guy/relationship in general than plain out sex. She sees through the bullshit. You can't trick her with the lies anymore because she has been there quite a few times and already knows how most people put up a front to get what they want. Saying she's not a "virgin" is to say that when you're naive, you can get tricked into a lot of things because you're inexperienced. She's saying if you're going to try playing any games with her, it's going to be like playing with fire because she's not a "virgin" anymore and knows the shit some people make up to emotionally and physically screw with a person.