The picture would not be complete without God being able to redeem the sexual nature. A little known fact (since a lot of natural heterosexuals think they can just slide by God on their sex lives because of that) is that God has ennobling power for everything there is about gender/sex that is not a sin. Men become more manly; women become more womanly; and yet with virtue (chaste outside of marriage, faithful within). Heterosexuals who are not giving themselves wholly to the Lord should be careful about throwing that first stone. It could boomerang.
the codifying of sex sin in mans 'law' is the real problem, and as CHRISTians we should be warning of the power and Glory of God to all those who continue to mock Him...
His Glory is what we try to show 'the world', through the Word, and as you said, we do benefit from better sex relationships when the design is understood and implemented in our lives...men can be men, and women can be women and everything seems to work out with more peace and harmony...
Merry CHRISTmas again to you and yours...