Well, if you have the money go see a sex therapist. On the cheap, you can try to turn her onto the idea of renting and watching adult films together... Let her pick out what she is comfortable with and they try and reenact it in real-life... That, or have her WRITE down her fantasies if she feels uncomfortable talking about it... There are a lot of things you can do... Another one is, if you're not in good shape, go to the gym and get toned up... Some girls can be into your personality and money but not your looks and the sex suffers...