《玉房秘诀》云∶冲和子曰，《易》云∶天垂象，见吉凶，圣人象之。《礼》云∶雷将发
声，生子不成，必有凶灾。斯圣人作诫（诚），不可不深慎者也。若夫天变见于上，地灾作
于下，人居其间，安得不畏而敬之？阴阳之合，尤是敬畏之大忌者也。
又云∶彭祖云∶消息之情，不可不去，又当避大寒大热，大风雨、日月蚀、地动雷电，
此天忌也。醉饱喜怒，忧悲恐惧，此人忌也。山川神祗杜穗，井灶之处，此地忌也。既避三
忌，犯此忌者，既致疾病，子必短寿。
又云∶凡服药虚劣及诸病未平复，合阴阳，并损人。
又云∶月杀不可以合阴阳，凶；又云∶建、破、执定日及血忌日不可合阴阳，损人。又
云。
彭祖云∶奸淫所以使人不寿者，未必鬼神所为也。或以粉纳阴中，或以象牙为男茎而用
之，皆贼年命，早老速死。
《虾墓图经》云∶黄帝问于歧伯曰∶男女所俱得病者，何也？歧伯对曰∶以其不推月之
盛毁，之暗明，不知其禁而合阴阳，是故男女俱得病也。
月生四日不可合阴阳，发痈疽；月生六日不可合阴阳，是故男女俱得病也。
月生九日不可合阴阳；月生十五日不可合阴阳，女子中风病大禁，月毁三十日不可合阴
阳，禁。
《华佗针灸经》云∶冬至、夏至、岁旦，此三日前三后二皆不灸刺及房室，杀人，大禁。
《养生要集》云∶房中禁忌∶日月晦朔，上下弦望，六丁六丙日，破日，月二十八日，
月蚀，大风甚雨，地动，雷电霹雳，大寒大暑，春秋冬夏节变之日，送迎五日之中，不行阴
阳。本命行年禁之，重者夏至后丙子丁巳。（今按∶《玉房秘诀》云∶丙午丁未黄帝问《素女
经》作丙子丁丑。）
冬至后庚申辛酉及新沐头，新远行疲倦大喜怒者，不可合阴阳，至丈夫衰忌之年不可忌
施精。
又云∶安平崔实子真《四民月令》曰∶五月是曰仲夏，是月也。至之日阴阳争血气散，
先后日至各五日寝别内外（月令曰是上声也）十一月仲冬是月也，至之日也，阴阳争血气散
先后至日各五日寝别内外。
又云∶交接尤禁醉饱，大忌也，损人，忌也。损人百倍醉而交接或致恶创或致上气。欲
小便而忍之，以交接使人得淋；或小便难，茎中溘，小腹强大。喜怒之后不可以交接，发痈
疽。
又云∶卜先生云，妇人月事未尽而与交接，既病。女人生子或面上有赤色凝如手者或合
在身体。又男子得白驳病（又云已醉勿房 已房勿醉 已饱勿房 已房勿饱 已劳勿房 已
房勿劳 已饥勿房 已房
洞玄子云，男年倍女损女，女年倍男损男。
又云∶《素女论》曰，五月十六日，天地牝，牝日不可行房，牝之不出三年必死。何以
知之。但取新布一尺
又云∶交接所向时日，吉利，益损顺时，效此大吉。
春首向东 夏首向南 秋首向西 冬首向北
阳日益（单日是）阴日损（双日是）阳时益（子时以后午前是）阴时损（午时以后子前
是）
春甲乙 夏丙丁 秋庚辛 冬壬癸
《千金方》云∶四月十月不得入房（阴阳能用事之月）
又云∶日初入后勿入房。
又云∶新劳须沐浴然后合御，不沐浴不可御也。
又云∶凡热病新瘥及大病之未满百日，气力未平复西以房室者略无不死。热病房室名为
阴阳之病皆
即以小腹急痛手足拘拳而死。
治之方，取女 衣附毛处烧服方寸匕，日三，女人病可取男 如此法。（今案葛氏方云
得童女
又方取所与交妇人衣覆男子上一食久。
The *Yufang Mijue* (Secrets of the Jade Chamber) records: Chonghezi said, the *I Ching* (Book of Changes) states: "Heaven manifests phenomena, revealing good and ill fortune; the sage imitates them." The *Liji* (Book of Rites) states: "If conception occurs when thunder is about to sound, the fetus will not develop properly, and there will surely be disaster." This is a warning established by the sages, which must be deeply respected and cautious. If heavenly anomalies appear above and earthly disasters arise below, how can humans, living between heaven and earth, not fear and revere these taboos? Yin-Yang intercourse is particularly a major taboo requiring reverence.
It also records: Peng Zu said: "Regulating sexual desire, one must eliminate excessive indulgence, and should also avoid extreme cold, extreme heat, strong winds and heavy rain, solar and lunar eclipses, earthquakes, and lightning. These are heavenly taboos." Drunkenness, overeating, uncontrolled anger or joy, sorrow, grief, worry, and fear are human taboos. Places of worship for mountain and river deities, areas where crops grow, wells, and stoves are geographical taboos. Having avoided these three types of taboos, those who violate them will cause disease, and their offspring will inevitably have short lives.
It also records: For those who are physically weak and debilitated, or whose various illnesses have not yet recovered, engaging in Yin-Yang intercourse will damage the body.
It also records: On days of "Moon Killing" (a specific astrological day), one must not engage in Yin-Yang intercourse, as it is ominous; furthermore, on Jian (Establishment), Po (Break), Zhi (Hold), Ding (Settle) days, and Xueji (Blood Taboo) days, one must not engage in Yin-Yang intercourse, as it damages the person. It also says:
Peng Zu said: "Adultery causes shortened lifespan not necessarily due to ghosts or gods. Some insert powder into the vagina, some use ivory phalluses, all of which steal years and life, leading to premature aging and rapid death."
The *Xiamu Tujing* (Illustrated Classic of Xiamu) records: The Yellow Emperor asked Qibo: "What is the reason for diseases contracted jointly by men and women?" Qibo replied: "Because they do not deduce the waxing and waning of the moon, nor understand its brightness and darkness, failing to know the prohibitions before engaging in Yin-Yang intercourse, thus both men and women fall ill."
On the fourth day after the new moon, one must not engage in Yin-Yang intercourse, or carbuncles and sores will erupt; on the sixth day after the new moon, one must not engage in Yin-Yang intercourse, therefore both men and women fall ill.
On the ninth day after the new moon, one must not engage in Yin-Yang intercourse; on the fifteenth day after the new moon, one must not engage in Yin-Yang intercourse; for women, wind-stroke is a major prohibition; on the thirtieth day of the waning moon, one must not engage in Yin-Yang intercourse, this is prohibited.
The *Huatuo Zhenjiu Jing* (Huatuo's Classic of Acupuncture and Moxibustion) records: Before and after Dongzhi (Winter Solstice), Xiazhi (Summer Solstice), and Suidan (New Year's Day)—specifically two days before and two days after—moxibustion, acupuncture, and sexual intercourse are prohibited. Violating this kills people; it is a major prohibition.
The *Yangsheng Yaoji* (Essentials for Health Preservation) records: Sexual Taboos: During Rihui and Yueshuo (new moon and last day of the month), Shangxian, Xiawan, Wang (full moon), Liuding and Liubing days, Po days, the 28th day of the lunar month, lunar eclipses, strong winds and heavy rain, earthquakes, lightning and thunder, extreme cold and heat, days of seasonal transitions in Spring, Summer, Autumn, and Winter, during the five days of sending off and welcoming spirits, Yin-Yang intercourse should not be performed. One's Benming year (natal year) and Xingnian (annual luck year) also have prohibitions; severe cases include Bingzi and Dingsi days after Summer Solstice. (Note: *Yufang Mijue* states: Bingwu and Dingwei days; the Yellow Emperor asked the *Sunu Jing*, originally written as Bingzi and Dingchou days.)
After Dongzhi, on Gengshen and Xinyou days, or after newly washing hair, after long-distance travel causing fatigue, or after great anger or joy, one must not engage in Yin-Yang intercourse. Until a man reaches an age of decline where ejaculation is forbidden, he must abstain from emitting essence.
It also records: Cui Shi (courtesy name Zizhen) of Anping, in his *Simin Yueling* (Monthly Ordinances for the People), stated: In May, the middle of summer, upon the arrival of the solstice, Yin and Yang contend, and blood and qi scatter. Five days before and after the solstice, men and women should sleep separately in inner and outer quarters (the Monthly Ordinances note this refers to the 'Shang' tone). In November, the middle of winter, upon the arrival of the solstice, Yin and Yang contend, and blood and qi scatter. Five days before and after the solstice, men and women should sleep separately in inner and outer quarters.
It also records: Intercourse is especially prohibited when drunk or full; this is a major taboo that damages the body. Damaging the body a hundredfold more than intercourse while drunk may lead to malignant sores or rebellious Qi. Holding urine during intercourse can cause Lin syndrome (dysuria); difficulty urinating, stabbing pain in the urethra, and a hard, distended lower abdomen may occur. One must not engage in intercourse after great anger or joy, as it may trigger carbuncles and sores.
It also records: Master Bu said: If intercourse occurs before a woman's menstrual flow has completely ceased, illness results. After childbirth, a woman may develop red patches on her face like a handprint, or lesions distributed over the body. Men may contract Baibo disease (vitiligo). (Also said: Do not have sex when drunk; do not get drunk after having sex; do not have sex when full; do not have sex after eating until full; do not have sex when exhausted; do not have sex after exertion; do not have sex when hungry; do not have sex after fasting.)
Dongxuanzi said: If a man's age is double a woman's, it harms the woman; if a woman's age is double a man's, it harms the man.
It also records: The *Sunü Lun* (Discourse of the White Lady) states: On the 16th day of the fifth month, Heaven and Earth are Yin (female). On Yin days, sexual intercourse is prohibited; doing so will result in death within three years. How do we know this? Take one chi of new cloth...
It also records: The timing and direction of intercourse determine auspiciousness. Beneficial or harmful effects depend on following the seasons. Following this brings great auspiciousness.
In early Spring, face East; in early Summer, face South; in early Autumn, face West; in early Winter, face North.
Yang days increase vitality (odd numbers are Yang); Yin days decrease vitality (even numbers are Yin). Yang hours increase vitality (after Zi hour until noon is Yang); Yin hours decrease vitality (after Wu hour until Zi hour is Yin).
Spring: Jia and Yi; Summer: Bing and Ding; Autumn: Geng and Xin; Winter: Ren and Gui.
The *Qianjin Fang* (Prescriptions Worth a Thousand Gold) records: In April and October, one must not enter the bedchamber (months when Yin and Yang cannot function properly).
It also records: Do not enter the bedchamber at sunrise or sunset.
It also records: After new labor/exertion, one must bathe before sexual activity; without bathing, one must not engage in sexual activity.
It also records: For those who have just recovered from febrile diseases, or have not yet passed one hundred days since a major illness, if their strength has not recovered and they engage in sexual activity, almost none survive. Engaging in sex during a febrile disease is called "Yin-Yang Disease," and all...
Immediately present with acute lower abdominal pain and convulsed limbs, leading to death.
The treatment method: Take the part of a woman's garment with hair attached, burn it, and take one cun bi (a small spoonful measure) of the ash, three times daily. For women's illnesses, take a man's garment and follow this method. (Note: Ge Shi Fang records: Obtain a virgin girl...)
Another prescription: Take the garment of the woman with whom intercourse occurred, cover the man with it, and let him eat for the duration of one meal.