We have talked about marriage. She has been thinking about temple marriage, and that is something I will never be able to do for her. Now multiply that stress by ten when you get married and have kids. So I would advise if religion is important to you to find someone of similar faith. The best way is in the way she likes to be pleased, which varies from one woman to another and from one day to the next.
Communication is the foundation to good love and good sex.
That means showing and telling. So, if she doesn't volunteer the information, then you should ask. In fact, the more you ask, the more attentive you are, and she might like that. They intuitively know. That is not real life though.