Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 3
Fragment ID: 14937
It is of course true that the nerves get upset by the habit of masturbation (frequently done daily or continued for a long time) apart from other untoward results. In Hathayoga and Rajayoga to carry on sex along with the Yoga is extremely dangerous. But it is not safe (physically) with any Yoga, unless the practice of Yoga is only nominal or unless the mind and nerves are made of iron. The spiritual unsafeness is of course always there.