My last GF loved this. We had never tried it but I suggested it one time and once she got in the groove it became her favorite way to blow me. Basically she would lie back, open wide and let me straddle her and do all the work. She used her tongue of course and also her hands to play with me, but she let me handle all the penetration. Of course this took great trust because she had to rely on me not to go to deep and to stop when I knew she needed me to, but we had that so it was all good. She said she loved it this way because it was easier. I think she also liked the submissive aspects of it. I never thought of us as dominant/submissive because people who knew us wouldn't see that, but I guess in the bedroom everyone is different. It's funny. She liked to have me in control of everything but she wasn't shy about being clear what she wanted me to do either.