Plants and animals cannot control their urge to spill their seed. Women have no control over their red seed. Their menstrual cycle is fettered to nature’s rhythms like the waxing and waning of the moon and the movement of the tides. Only the human male has the power to control the movement of his white seed. It can flow downwards in pleasure or to procreate ’ this results in mortality. It can be made to flow upwards with yoga. This generates wisdom, ignites the spiritual fire of Tapa and results in immortality. This upward movement of semen is described in Tantra as Urdhvaretas.
