It does not specifically tell you that you must be HD. But in different passages, including the Song of Solomen, it tells you what required by both spouses in marriage. In fact, I see it as the MODEL for the perfect marriage. Most of the marriage books I have read more or less follow the model of the bible. Anyway, back to the HD part. Like I said, being required to be HD is not in the Bible. However, the things that the Bible says must happen are extremely hard to achieve if you are Low desire.