In taoism, there is a concept that sperm is a man's life force. More ejaculations = life force leaving body = potential health/mental problems and life shortening. This is complementary to the improvements of going into Monk Mode and NoFap, etc... One central technique to sperm conservation is the Big Draw. Put Simply, the Big Draw is pressing the area between your anus and balls several seconds before ejaculation till it subsides resulting in the sperm flowing back into the balls. (http://www.divinetantrictouch.com/exploring-the-big-draw%E2%80%A6how-it-works/) I have used this for over a year and the results have been positive. Although, I do admit to porn and masturbation, using the big draw every time gets me the body benefits. However, the mental side is still screwed from the porn and false orgasm. Using it with a partner is also beneficial. Evolutionary studies show that women will refuse sex with a man if they know that a big task is soon coming in order to conserve their man's energy. tldr: Sperm Conservation through the big draw can provide massive physical/mental benefits

Edit: Also practice by Steve Jobs http://www.reuniting.info/blogs/karezza-korner/steve-jobs-wanted-make-tantric-love-his-garden-shed