《玉房秘诀》云∶黄帝问素女曰∶道要不欲失精，宜爱液者也。即欲求子，何可得泻？
素女曰∶人有强弱，年有老壮，各随其气力，不欲强快，强快即有所损。故男年十五，盛者
可一日再泻，瘦者可一日一泻；年二十岁者，日再施，羸者可一日一施；年三十，盛者可一
日一施，劣者二日一施；三十，盛者三日一施，虚者四日一施；五十，盛者可五日一施，虚
者可十日一施；六十，盛者十日一施，虚者二十日一施；七十，盛者可三十日一施，虚者不
泻。
又云∶年二十，常二日一施；三十，三日一施；四十，四日一施；五十，五日一施；年
过六十以去，勿复施泻。
《养生要集》云∶道人刘京云∶春天三月壹施精，夏及秋当一月再施精，冬当闭精勿施。
夫天道，冬藏其阳，人能法之，故得长生。冬一施，当春百。
《千金方》云∶素女法∶人年二十者四日一泄；年三十者八日一泄；年四十者十六日一
泄；年五十者二十一日一泄；年六十者即毕，闭精勿复更泄也，若体力犹壮者，一月一泄。
凡人气力，自相有强盛过人者，亦不可抑，忍久而不泄，致痈疽。若年过六十而有数旬不得
交接，意中平平者，可闭精勿泄也。
洞玄子云∶凡欲泄精之时，必须候女快，与精一时同泄。男须浅拔，游于琴弦、麦齿之
间。阳锋深浅，如孩儿含乳，即闭目内想，舌拄下 ， 脊引头，张鼻歙肩，闭口吸气，精
便自上。节限多少，莫不由人。十分之中，只得泄二三矣。
《玉房秘诀》记载：黄帝问素女说：养生的关键不在于禁绝泄精，而在于爱惜精气。如果为了求子，怎么能不射精呢？
素女回答说：人的体质有强弱之分，年龄有老幼之别，应当各自根据自身的体力来决定，不要追求强烈的快感，过度追求就会造成损伤。所以男子十五岁时，体质强壮的可以一天射精两次，瘦弱的人可以一天射精一次；二十岁时，体质强壮的两天射精两次，瘦弱的人可以一天射精一次；三十岁时，体质强壮的一天射精一次，体弱的人两天射精一次；四十岁时，体质强壮的三天射精一次，虚弱的人四天射精一次；五十岁时，体质强壮的五天射精一次，虚弱的人十天射精一次；六十岁时，体质强壮的十天射精一次，虚弱的人二十天射精一次；七十岁时，体质强壮的三十天射精一次，虚弱的人则不应再射精。
又说：二十岁的人，常以两天射精一次为宜；三十岁的人，三天射精一次；四十岁的人，四天射精一次；五十岁的人，五天射精一次；过了六十岁以后，不要再进行射精。
《养生要集》记载：道人刘京说：春季三个月中，一个月射精一次；夏季和秋季，一个月射精两次；冬季应当闭藏精气，不要射精。这是顺应天道，冬天阳气内藏，人若能效法它，就能长生。冬天若射一次精，相当于春天射一百次的损耗。
《千金方》记载：素女的方法说：二十岁的人，四天射精一次；三十岁的人，八天射精一次；四十岁的人，十六天射精一次；五十岁的人，二十一天射精一次；六十岁的人就应停止，闭藏精气不再射精，如果体力依然健壮，可以一个月射精一次。
一般人的体力，有的确实超过常人，也不可强行抑制，忍耐过久不射精，会导致痈疽（皮肤肌肉发生的化脓性感染）。如果过了六十岁，有几十天不能进行房事，心中没有强烈欲望的，可以闭藏精气不再射精。
洞玄子说：凡是想要射精的时候，必须等待女方达到高潮，与精子同时排出。男性需要浅入浅出，在琴弦、麦齿（比喻阴道口或敏感部位）之间游移。阴茎插入的深浅，就像婴儿含住乳头一样，随即闭上眼睛向内观想，舌头抵住下颚，脊柱牵引头部，张开鼻孔收缩肩膀，闭口吸气，精气便从上方回归。节制的程度多少，全由人自己掌握。十分之中，只能射出两三分罢了。
*The Yufang Mijue* (Secrets of the Jade Chamber) records: The Yellow Emperor asked Su Nü, saying: The essence of the Dao lies not in abstaining from ejaculation, but in cherishing one's essence. If one seeks to conceive a child, how can one avoid ejaculation?
Su Nü replied: People vary in strength and weakness, and ages differ between old and young. One should follow their own qi and physical capacity, not striving for intense pleasure; striving too hard causes damage. Thus, at age fifteen, those who are robust may ejaculate twice a day, while those who are thin may ejaculate once a day; at age twenty, those who are robust may ejaculate twice every two days, while those who are emaciated may ejaculate once a day; at age thirty, those who are robust may ejaculate once a day, while those who are inferior may ejaculate once every two days; at age forty, those who are robust may ejaculate once every three days, while those who are deficient may ejaculate once every four days; at age fifty, those who are robust may ejaculate once every five days, while those who are deficient may ejaculate once every ten days; at age sixty, those who are robust may ejaculate once every ten days, while those who are deficient may ejaculate once every twenty days; at age seventy, those who are robust may ejaculate once every thirty days, while those who are deficient should not ejaculate at all.
It is also said: At age twenty, it is customary to ejaculate once every two days; at age thirty, once every three days; at age forty, once every four days; at age fifty, once every five days; after passing sixty years of age, one should no longer ejaculate.
*Yangsheng Yaoji* (Essentials of Health Preservation) records: The Daoist Liu Jing said: In the spring months (the first three months), one should ejaculate once a month; in summer and autumn, one should ejaculate twice a month; in winter, one should close the essence and not ejaculate. This follows the Heavenly Dao: in winter, yang energy is stored within. If humans emulate this, they can achieve longevity. One ejaculation in winter is equivalent to a hundred in spring.
*Qianjin Fang* (Prescriptions Worth a Thousand Gold) records: The method of Su Nü states: Those aged twenty should ejaculate once every four days; those aged thirty, once every eight days; those aged forty, once every sixteen days; those aged fifty, once every twenty-one days; those aged sixty should cease entirely, closing the essence and no longer ejaculating. However, if physical strength remains vigorous, one may ejaculate once a month.
Generally, people’s physical capacities vary, with some being exceptionally strong. Yet, even so, one must not forcibly suppress the urge; enduring too long without ejaculation can lead to *yongju* (carbuncles and sores). If one has passed sixty years of age and has not engaged in intercourse for several decades, and feels no strong desire, one may close the essence and refrain from ejaculation.
*Dongxuanzi* states: Whenever one wishes to ejaculate, one must wait until the female partner reaches climax, releasing the essence simultaneously. The male should withdraw shallowly, moving between the "qin strings" and "wheat teeth" (metaphors for the vaginal opening or sensitive areas). The depth of penetration should be like an infant sucking milk. Then, close the eyes and visualize inwardly, press the tongue against the lower palate, draw the spine to lift the head, open the nostrils, contract the shoulders, close the mouth, and inhale. The essence will then return from above. The degree of restraint depends on human control. Of ten parts, only two or three should be released.