《玉房秘诀》云∶冲和子曰∶养阳之家，不可令女窃窥此术，非但阳无益，乃至损病。
所谓利器假人，则攘袂莫拟也。
又云∶彭祖曰∶夫男子欲得大益者，得不知道之女为善。又当御童女，颜色亦当如童女。
女但苦不少年耳。若得十四五以上、十八九以下，还甚益佳也。然高不可过三十，虽未三十
而已产者，为之不能益也。吾先师相传此道者，得三千岁。兼药者可得仙。
又云∶欲行阴阳取气养生之道，不可以一女为之得。得三若九、若十一，多多益善。采
取其精液，上鸿泉，还精、肥肤、悦泽、身轻、目明，气力强盛，能服众敌，老人如二十时。
若年少，势力百倍。
又云∶御女欲一动辄易女。易女可长生若故。还御一女者，女阴气转微，为益亦少也。
又云∶青牛道士曰∶数数易女则益多，一夕易十人以上尤佳。常御一女，女精气转弱，
不能大益人，亦使女瘦 也。
《玉房指要》云∶彭祖曰∶交接之道无复他奇。但当纵容安徐，以和为贵。玩其丹田，
求其口实，深按小摇，以致其气。女子感阳亦有微候，其耳热如饮淳酒，其乳暖起，握之满
手，颈项数动，两脚振扰，淫衍窈窕乍男身，如此之时，小缩而浅之，则阳得气于阴，有损。
又，五脏之液，要在于舌，赤松子所谓玉浆可以绝谷，当交接时多含舌液及唾，使人胃中豁
然如服汤药，消渴立愈，逆气便下，皮肤悦泽，姿如处女。道不远求，但俗人不能识耳。采
女曰∶不逆人情，而可益寿，不亦乐哉。
《玉房秘诀》记载：冲和子说：修习房中养生术的人，不能让女子偷偷窥探这门技术。这不仅仅是因为男子得不到益处，甚至会导致疾病损伤。
这就好比把锋利的兵器借给别人，卷起袖子也无法抵挡（反受其害）。
又记载：彭祖说：男子想要获得最大的益处，最好与不懂房中术的女子进行交合。另外应当与处女交合，女子的容貌也应当像处女一样。
女子只要年纪不太小就好。如果能得到十四五岁以上、十八九岁以下的女子，那就非常有益了。然而年龄最高不能超过三十岁，即使未满三十岁但已经生育过的女子，与之交合也不能带来益处。我的先师相传此道，据说能活到三千岁。如果配合药物服用，可以成仙。
又记载：想要行阴阳采气养生的方法，不能只依靠一个女子就能达到效果。得到三个、九个或十一个女子，越多越好。采集她们的精液，引导至“鸿泉”（指体内特定部位或能量通道），返还精气，滋养肌肤，使面色润泽，身体轻盈，目光明亮，气力强劲，能够抵御各种邪气，老人恢复如二十岁时的状态。如果是年轻人，功效更是百倍增强。
又记载：御女（与女子交合）时，动一次就更换一个女子。更换女子可以长生不老，或者保持原有的健康状态。如果反复与同一个女子交合，女子的阴气会逐渐微弱，带来的益处也会减少。
又记载：青牛道士说：频繁更换女子则益处更多，一晚更换十人以上尤其好。经常与同一个女子交合，女子的精气会转弱，不能给人带来大的益处，也会使女子消瘦。
《玉房指要》记载：彭祖说：交接的方法没有其他的奇特之处。只应当放纵宽容、安详舒缓，以和谐为贵。玩弄其丹田，寻求口实（指接吻或唾液交换），深按并轻微摇动，以激发气机。女子感受阳气后也有细微的征候，她的耳朵发热如同喝了美酒，乳房温暖隆起，握住时手感饱满，颈项多次抽动，双脚震颤扰动，身体姿态柔美变幻，此时若稍微收缩阴茎并浅入，那么阳气从阴气中获得，会有损耗。
另外，五脏的津液，关键在于舌头，就是赤松子所说的“玉浆”可以断绝谷食。应当在交接时多含住舌下的津液及唾液，使人胃中豁然开朗，如同服用了汤药，消渴症立即痊愈，逆气随即下降，皮肤润泽，姿态如处女一般。大道不远求，只是世俗之人不能识别罢了。采女说：不违背人之常情，却可以益寿延年，难道不快乐吗？
According to the *Yufang Mijue* (Secrets of the Jade Chamber), Chonghezi stated: Those practicing sexual cultivation must not allow women to secretly observe these techniques. Not only will this bring no benefit to the man, but it may even cause disease and injury.
This is likened to lending a sharp weapon to another; one would be unable to defend oneself when sleeves are rolled up for combat.
It further states: Pengzu said: For men desiring great benefit, it is best to engage with women who do not understand these arts. Furthermore, one should engage with virgins, whose appearance should resemble that of a maiden.
The woman should simply not be too young. If one can obtain a girl aged between fourteen or fifteen and eighteen or nineteen, it is highly beneficial. However, the age should not exceed thirty. Even if under thirty, women who have already given birth cannot provide such benefits. My predecessors who transmitted this Dao claimed to live for three thousand years. Those who combine it with herbal medicine may attain immortality.
It also states: To practice the Dao of Yin-Yang Qi extraction for health preservation, relying on a single woman is insufficient. Obtaining three, nine, or eleven women is better, and the more the merrier. By collecting their essence, guiding it to the "Hongquan" (Great Spring), returning the essence to nourish the skin, enhance luster, lighten the body, clarify the eyes, and strengthen Qi and physical power, one can resist various adversaries. The elderly will appear as they did at twenty. For the young, the effect will be a hundredfold.
It further states: When engaging with women, change partners with each movement. Changing partners promotes longevity or maintains original vitality. If one repeatedly engages with the same woman, her Yin Qi becomes weaker, and the benefits diminish.
It also states: The Green Ox Doctor said: Frequently changing partners yields greater benefits; changing more than ten partners in one night is particularly excellent. Consistently engaging with the same woman causes her essence and Qi to weaken, failing to greatly benefit the man, and also causes the woman to become emaciated.
According to the *Yufang Zhiyao* (Essentials of the Jade Chamber), Pengzu said: The art of intercourse holds no other mysteries. One should merely be indulgent, tolerant, calm, and slow, valuing harmony above all. Stimulate the Dantian, seek oral contact, press deeply with slight oscillation, to induce Qi flow. When a woman responds to Yang Qi, there are subtle signs: her ears turn red as if intoxicated by fine wine, her breasts warm and swell, feeling full in the hand, her neck moves repeatedly, her legs tremble and disturb, and her posture becomes soft and alluring. At this moment, if one slightly retracts and penetrates shallowly, the Yang Qi drawn from Yin will result in loss.
Furthermore, the fluids of the five Zang organs center on the tongue, which is what Chisongzi referred to as "Jade Saliva" capable of sustaining life without grain. During intercourse, one should retain much saliva and tongue fluid, making the stomach feel open and clear, as if taking herbal decoctions. Thirst-quenching diseases will heal instantly, rebellious Qi will descend, the skin will become lustrous, and the demeanor will resemble that of a virgin. The Dao is not far to seek; it is merely that common people fail to recognize it. Cai Nu said: Not going against human nature yet extending lifespan—is this not joyful?