Ideally, one’s central nervous system will get instantly recharged upon orgasm. It will then command the pituitary and the other endocrine organs to produce more DHEA and testosterone. That is true only if the ejaculation can send the orgasmic energy back to the central nervous system and pituitary using energy water pathway – the spinal cord.
The problem is the orgasmic wave energy has to pass through the periodical structure of the spinal cord which produces resonant (Bragg’s) reflection of the orgasmic wave train. That is, only a small amount of orgasmic wave energy can reach the brain. Generally speaking, to repower the brain function upon ejaculation, one has to accumulate a lot of sexual energy before orgasm.
Sex and masturbation are different in nature. In sex, one extracts sexual energy from a partner to power the penis to maximum size (that is when one feels the penis going numb or semi-numb with a massive erection). When orgasm occurs, contraction of the prostate muscle sends a powerful orgasmic wave back to the brain that stimulates the central nervous system and endocrine organs – adrenal cortexes, the pituitary, and testicles. After an enjoyable sexual encounter one will be surprised to find out that is not feeling very exhausted or tired. This is because the endocrine system has been re-powered by the massive orgasm. Masturbation usually cannot help one achieve that kind of recharge.