I had read about it a few months back. Its called the lions point or something. Its used by beginner taoist practitioners. The way it works is you masturbate and orgasm but you don't ejaculate. In the sense you don't loose any sperm. So you don't feel exhausted at all and can keep going again and again once your penis is hard again. You don't really loose interest in the act as you normally would after climax. This is just a beginner technique though there is a whole lot more. What you do is when your about to ejaculate , you press down HARD between your balls and your anus.(Perineum) with all four fingers to stop the flow of sperm from going out. Just a little something to ponder over. If you wanna learn more of how not to loose your precious energy check out Mantak Chia and his teachings on Taoism. I'm still reading a few of his books. The is a whole lot.