A long time ago I had some experience with BDSM but had no idea I was even doing it. I have been dating a girl for a few weeks now and we have really fallen for each other. We haven't had sex yet and she has mentioned a few things that really turn her on. She likes her hair pulled, face pushed in the bed, and wants a strong man that knows exactly what he wants and takes it. She wants me to get a little rough and treat her like a "grown woman" as she will not break. I take this as she wants me to be the dom. This is a complete 180 from my sex life for the past 20 years, which was very vanilla. We were having a discussion the other night and she slapped me, probably to see what my reaction would be. We kissed later that night and she forcefully bit my lip. Being new at this, I am a little apprehensive. Is she trying to challenge me? Does she really want me to be the dom? I don't know how to interpret these signals? I know that if I am to perform like the dom, I have to be 100% sure of what I'm doing but she knows I haven't been for a while.