You didn't ask me any questions about good or evil; you asked me where rights come from, and I answered that question. I can't very well answer a question that I am not asked. If you'd like to ask me a question about good and evil, please feel free to do so.
My right to swing my fist ends where your nose begins. That's fairly easy to understand, right?
I'm not sure what you're referring to when you say "accountability to another." You certainly must secure the informed consent of whatever party you are having sex with (and that person must be competent to give consent, meaning of legal age and not intoxicated or otherwise impaired). If you are in a relationship with another person wherein you have made an agreement of sexual exclusivity, it is wrong to break that agreement and have sex with someone else. One should be responsible and respectful in one's sexual encounters (including matters of contraception and STI testing).
I'm not sure what this sentence is intended to connect up to.
Good, of course. I have no evil answers. My answers hug puppies and bake cookies.
Nope; rights apply to everyone, and everyone's rights must be upheld and protected. That's the whole point. I don't see where your confusion stems from.
Not at all. "In my world," as you put it, freedom is the default and a compelling reason must exist to infringe upon it. That reason, most of the time, is another person's freedom. When freedoms conflict, one examines the situation and determines which party is attempting to infringe on the other. One man's right to swing his fist ends where the other man's nose begins. It's fairly straightforward.