Quote Originally Posted by thir View Post
Apart from that, it sounds a bit like you think that because we are wired to reproduce, sexual attraction almost certainly must develope between two persons of opposite sex, regardless (more or less) of the situation.
Actually, I don't think it's inevitable. People are not attracted to everyone of the opposite sex, of course. But I think establishing a friendship first brings about a large degree of familiarity between people, and that familiarity CAN develop into a sexual attraction more easily.

As for jealousy being part of our genetic make-up I do not really believe that. I think it is expectations and habit of thinking.
I know both men and women who are not jealous, and for my own part I have learned that if there is no fear of loosing and no neglect of my needs, I am not jealousy. I have experienced this. He could have sex with another women right next to me, and I did not care. I am not sure monogamy is a default either, but a choice.
Perhaps jealousy is too strong a term for what I was saying. Envy may be more accurate. True, some people feel it more than others, and some may not feel it at all. One thing that's true for all of us is that there is nothing that is true of all of us.