I'm(M) not experienced in this space but kind of trying to understand the thought process of my fwb(F) from an outside perspective before talking with her about it.

I am a very mellow, soft spoken and non intimidating or domineering fellow. Sexually, this was a major problem in my previous relationship because my partner did not feel like submitting to me (I do admit that I was far more vanilla than her) even though outside of sex, we had a good relationship. The mental aspect of being with a certain kind of person was not fulfilled for her and this led to us not having the kind of a sexual relationship we both wanted

Been seeing this new woman for a few weeks casually and working towards a fwb situation. Recently, we slept together for the first time and she was open to me doing the nastiest things to her. I had complete control over her. I'm still the same mellow and soft spoken guy and even she was surprised by some of the things I did but I asked her before and she was ok with it. She said she really loved it and we will be doing it again soon.

I don't really understand why she submitted to me. She said she encountered really nasty and impatient guys before and that i was not like that. I'm a fairly confident person, respectful of other people's space, like to take things slow and know my way around a woman's body. She said she feels safe around me because I'd never do something to make her feel uncomfortable or cause her harm

Would these be reasons you'd submit to your partner and let them do some nasty stuff to you?