My husband gave a battery of intelligence and personality tests to a job applicant. One question was, "If you were given a million dollars, what would be the first thing you would buy?' The young man replied, "A thank-you card."
A man will teach his wife what is needed to arouse his desires. And there is no reason for a woman to know any more than what her husband is prepared to teach her. If she gets married knowing far too much about what she wants and doesn't want then she will be ready to find fault with her husband.