Wiktionary
n. A syndrome in China in which the individual suffers somatic symptoms with anxiety, believed to be caused by a loss of semen.
Wikipedia
Shenkui( simplified Chinese:肾亏; Traditional Chinese:腎虧; pinyin:Shènkuī) is a culture bound syndrome native to China in which the individual suffers somatic symptoms with anxiety, believed to be caused by a loss of semen. And in Traditional Chinese Medicine,shen (kidney) is the reservoir of vital essence in semen ( ching) and k’uei signifies deficiency.
Shenkui or shen-k'uei is one of several Chinese culture-bound syndromes locally ascribed to loss (or fear of loss) of Yang( Chinese:陽) . In Traditional Chinese Medicine,Shenkui is believed to result from a deficiency in yang, obtained through the loss of semen. Semen is believed to be "lost" through excessive sexual activity or masturbation, nocturnal emissions, "white urine" which is believed to contain semen, or other mechanisms. Symptoms within the Chinese diagnostic system include dizziness, backache, tiredness, weakness, insomnia, frequent dreams, and complaints of sexual dysfunction (such as premature ejaculation or impotence). From an ethnopsychiatric perspective, additional symptoms are preoccupation with sexual performance, potential semen loss, and bodily complaints which may be taken as symptoms of lost yang.
Losing semen reduces Yang, causing an unbalance in the body. Nocturnal emissions, too much intercourse, and masturbation resulting in ejaculation lower the levels of semen, causing loss of Yang. Somatic symptoms may include body soreness, aches, lack of energy, fatigue, and possibly problems in sexual performance.
A person suffering form Shenkui may endure body aches, dizziness, tiredness, inability to sleep, and sexual dysfunction, all for which no physical cause can explain.
The passing of semen too often is avoided because it is believed to be crucial to a person’s health and safety. It is believed to be life-threatening if too much semen is lost.
"Chinese martial artists that remained celibate through years and years of extensive training were believed to be most powerful, therefore maintaining the power of one’s vital essence."