You should seek help if you're the victim of ongoing domestic violence! the futuretimeline forum is likely not the best place to get assistance on this sort of issue.
I used to fight with my sisters, I lost against my older sister and usually won against my younger sister (sometimes they teamed up!). Then by the time i was old enough that i was taller than my older sister she started playing the "i'm too mature to fight" card. My sister is smart, that's what I learned from this! These days I work on computers all day and she actually lifts things occasionally so i'm pretty sure she'd win again now.
We all get on great now though, having grown out of the "I don't agree with you so I'm going to hit you" level of human interaction by the time we were all in our teens.
If it was up to me I can imagine only very few situations where I would be okay fighting someone, and even fewer where I'd be happy fighting a woman as an adult man, no matter how fair things are our societal preconceptions make that a no win situation.
tbh if I got in a fight as an adult I'd likely be terrified for my life, so things would escalate fast and someone would probably get stabbed. So realistically under those circumstances i'm not sure i'd really have time to stop and worry about the shape of my assailant's sex parts.