The restorative effect of sexual delight on husband and wife may perhaps be considered by analogy with the blessing of the Sabbath. Just as rhythms of Sabbath rest are instituted by the Creator for the sake of man (cf. Mark 2:27) to refresh him so that his work may be a joy, so sexual delight within marriage may refresh and restore husband and wife for the work to which the Creator has called them….Just as God gives rest in order that man may joyfully work (and not work for the sake of rest), so he gives husband and wife joy in sex that they may more joyfully serve, and not the reverse. When reversed, sexual delight and relational intimacy become ends in themselves. The paradox and tragedy is that, having been made into idols, they inevitably disappoint, frustrate and fade. So often in a healthy marriage sexual delight creeps up on the couple at unexpected moments, in the midst of lives of active service and outward-looking work. –Christopher Ash, Marriage: Sex in the Service of God, 188.
according to Script 