Hearkening back to my "sex class", I believe the anthropologist's current take on this question is a combination of A & B. Applying this perspective, I would state the following: My father is a chemist, my mother an English major. They share common morals and core beliefs, a comparable level of education, and a variety of other interests. Davi & I, too, have key things in common while still having many differences of interests and opinions. Differences keep a relationship interesting enough to continue; similarities keep it peaceful enough to continue. Those are my thoughts! :)