This thread is quite deep and metaphysical. Not all the information I will be giving here is confirmed by modern science. .but modern science is not perfect in my opinion and is limited to the material pradagim..and completely igoners spirituality and reilgions and metaphysics. According to eastern religions..especialy Hinduism(the oldest religion to ever exist ) there exist energy centers in your body called "chakras". 7 chakras .the root chakra(The sex centre).the sacral chakra .the solar plexus chakra .the heart chakra .the throat chakra. And the third eye chacrka. When your chakras are closed. You are asleep. Which means you are stuck in "maya" or illusion . The dream world of endless attachments and aversions .how you wake up to the truth?!..by opening your chakras. And this happens through sexual transmutaion .by rising your sexual energy (which Is life energy itself) up your chakras until the third eye. And when the third eye is open ..you discover the ultimate truth. Which is that the self is an illusion .The world is a dream. Your true nature is infinite unconditional and immortal awarness. You are god himself! . Now ..its impossible to achieve enlightenment if you waste your"virya " -semen.which is the sacred life giving energy inside of you.you have to preserve it and transumate it by mediation and yoga so you can achieve "nirvana"- the ultimate bliss. Semen retention is the first step towards achieving the goal of life itself .