By learning to conserve the sperm, men can redirect the energy of the orgasm throughout the body

One of the ancient practices within Taoism is controlling the male ejaculation during sex. Taoist practitioners believe that the loss of ejaculatory fluids equates with the loss of vital life force (or “jing”).

So by learning to conserve the sperm, men can redirect the energy of the orgasm throughout the body. In a world where the goal of sex is often only to get the male to ejaculate, these Taoist practices would be valuable to experiment with.

This doesn’t mean that men should never orgasm; it’s simply a spiritual concept worth practicing on occasion that can actually bring more pleasure, when practiced correctly, than ejaculation. 

Some Taoists believe that by redirecting the energy upwards toward the crown chakra, it can provide nourishment to the brain. In modern sex culture, some people refer to this as “edging,” although many men may do this for different reasons.

http://www.collective-evolution.com/2017/06/15/energetic-implications-of-sex-what-sleeping-with-different-people-could-do-to-your-aura/