Do I really have to learn how to do this? What are the benefits of such a discipline? Why did the yogis think it was important?
Si Vales, Valeo
You have been readin the Hatha Yoga Papridka, I see.
Back in the day, some Taoist sects theorized that sperm was the life force and shouldn’t be spent if one desired strength or a long lasting life. Maybe you have seen those comical drawings of men carrying their penises on wheelbarrows that were drawn hundreds of years ago. Not only did they not wish to spend the “life force,” but they also didn’t care much for the idea of giving up on sex, so they invented a way to ejaculate into their bladders by manipulating some of the muscles involved with orgasm. They thought they were “saving it” because they did not realize that the ejaculate was leaving their body with their urine.
My personal feelings is that some yogi accomplished it by accident, figured out how to replicate it, and then spread the rumors of long life and strength last to get others to do it. What a rascal! (I jest)
Or perhaps (and this is giving them a lot of credit) the yogis noticed that the parasympathetic nervous system was always on, automatic and independent even during sleep, and they wanted to exercise some conscious control over it.
This superstition is still with us today. Consider that some sports coaches forbid their players have sex the night before the game. As if their strength was somehow regulated by sperm. Others have tried to use this procedure (I think of it as a trick) to prevent pregnancy with disastrous results.
Getting back to the actual process of intraejaculation: It is a very dangerous practice because it is so difficult to unlearn. Ejaculating into your bladder by the manipulation of commonly involuntary muscles does not feel as good as regular ejaculation where the semen is ejected from the body, and if you accomplish it more than a couple of times you risk not being able to have regular orgasms at will. And since the entire theory is based on a false premise, why do it at all? Why deny yourself the pleasure just to see if you can do it?
Cast out superstition. Other than showing mastery over ones body, retroejaculation has about as much magical value as holding a bowl full of water on your head.