"When the penis and vagina become free of emotion they make ecstatic love. The sensation and perception is so heightened that at first there seems the possibility of losing consciousness because the pleasure is almost unendurable. As the process continues, the awareness is of being completely present as the consciousness of the divine love being made. There is no limit to the expanse of being and joy and the immediacy of the spirit that is known to be the union. It is being in the divine presence, a union of each other. And because it is love alone that is being made, and not emotion or imagination, and as love unlike emotion or orgasm has no end, the same rapturous physical and spiritual delight is present in all subsequent lovemaking together. It does not vary. It has only ups and no downs, no moods, no confusions, no emotional disasters. It only gets better, finer, more divine and more real, more conscious and more present; and the perception of love, godhead and eternal purpose becomes more wonderous, more sublime until ecstasy becomes beauty.
As by now you will appreciate, this does not happen easily. A good deal of emotional and intellectual dying has to be done. It takes a lot of work on yourself, and together. But the wonder of it is, it can be done."
Source: Making Love: Sexual Love the Divine Way by Barry Long pages 97-98.