Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 3
Conversion [of the sexual movement] is one thing and acceptance of the present forms in ordinary human nature is another. 
The reason given for indulging the sex-action is not at all imperative. It is only a minority that is called to the strict Yogic life and there will be always plenty of people who will continue the race. Certainly, the Yogi has no contempt or aversion for human nature; he understands it and the place given to each of its activities with a clear and calm regard. Also, if an action can be done with self-control without desire under the direction of a higher consciousness, that is the better way and it can sometimes be followed for the fulfilment of the divine will in things that would not otherwise be undertaken by the Yogin, such as war and the destruction which accompanies war. But a too light resort to such a rule might easily be converted into a pretext for indulging the ordinary human nature.