If you want your wife to be honest with you when you sit her down to have a heart to heart, you are going to have to be honest with her, and before you can do that you need to be honest with yourself (isn't there something in the Bible about that?) Your statement sounds so much like a veiled projection to me. Rather than use the excuse that you think there are a lack of women out there who have high desire (which I think is untrue), maybe the truth is that you are scared to find out if there are such women, because you are afraid to leave the security of your marriage, as bad as it may be? So who is holding you back from taking action, the scarcity of HD women or your own fears?