I also remember my father a stake president telling me the night before I got married that every single couple he had counseled through marriage struggles were not reading their scriptures or praying together every night. About two years into our marriage, I got sick of waiting in bed for him to come read scriptures with me.
The Church of Jesus Christ of Latter-day Saints teaches that all sexual relationships outside of marriage defined as the legal union between a man and a woman are sinful. If your date has been an active member of the Church who is following these moral guidelines, then she will not be willing to involve herself in a sexual relationship with you.
Did you know Joseph smith married the wives of other living men.