Stoker Ace: The last sentence of your post is the key. You can't change her. Different people have different preferences and boundaries. Like xxNervousxx says, all you can do is ask. If she says no, then you man up and either accept that or end the relationship.
Frankly, not everyone is into that kind of activity; and I think you should honor their right to feel that way and set those boundaries. The key is to make sure you find someone you're compatible with on the things that are important to you and that you can live with the areas in which you're not incompatible. To be very honest, if a girl asked me to do this, I would say no and if she said another word about it I would get my stuff and leave. The reality is that I'm not the only one who feels that way.
From the time I was a small child, I was taught "Live and let live." You owe it to her to respect her boundaries and her wishes. If you can't meet your needs within that relationship, then it's best for everyone to end the relationship.
I respect your right to make this choice, but I think ultimately you have to respect her right to make her choice also.