Godliness, as well as the doctrine of our faith, is a mystery.

Justifying faith is not a naked assent to the truths of the gospel.

Christ is the door that opens into God's presence and lets the soul into His very bosom, faith is the key that unlocks the door; but the Spirit is He that makes this key.

But speak thou the things which become sound doctrine: / That the aged men be sober, grave, temperate, sound in faith, in charity, in patience.

As thou these ashes, little brook! will bear Into the Avon, Avon to the tide Of Severn, Severn to the narrow seas, Into main ocean they, this deed accurst, An emblem yields to friends and enemies How the bold teacher's doctrine, sanctified By truth, shall spread throughout the world dispersed.

I have a hunch that the last institution around at this moment which has a high doctrine of sex is the Church. We still believe sex is a good gift from God but it needs to be in context of a committed, loving, continuing relationship.