The one that is great is the one that you gently do and it becomes  a passing of energy so wonderful that the warmth of the soul expands to the other and there are than no boundaries to separate. You become one with the other as a single soul before and with the consent of God . It is something that is very rare and only ever felt for such a brief moment. A feeling of a large but gentle warm movement passing through the barrier of the body as if there were nothing there to restrain or restrict . What must that really feel like when it is allowed? must be like an eternal bliss.