《玉房秘诀》云∶冲和子曰∶婉KT 淑慎，妇人之性美矣。夫能浓纤得宜，修短合度，
非徒取悦心目，抑乃尤益寿延年。
又云∶欲御女，须取少年未生乳、多肌肉、丝发小眼、眼精白黑分明者。面体濡滑、言
语音声和调而下者，其四肢百节之骨皆欲令没，肉多而骨不大者，其阴及腋下不欲有毛，有
毛当令细滑也。
《大清经》云∶黄帝曰∶入相女人云∶何谓其事？素女曰∶入相女人，天性婉顺，气声
濡行，丝发黑，弱肌细骨，不长不短，不大不少，凿孔欲高，阴上无毛，多精液者，年五五
以上，三十以还，未在产者。交接之时，精液流漾，身体动摇，不能自定，汗流四逋（通或
本），随人举止，男子者虽不行法，得此人由不为损。
又云∶细骨弱肌，肉淖KT 泽，清白薄肤，指节细没，耳目准高鲜白，不短不辽，浓
髀，凿孔欲高而周密，体满，其上无毛，身滑如绵，阴淖（倬），如膏，以此行道，终夜不
劳，便利丈夫，生子贵豪。
又云∶凡相贵人尊女之法，欲得滑内弱骨，专心和性，发泽如漆，面目悦美，阴上无毛，
言语声细，孔穴向前，与之交会，终日不劳，务求此女，可以养性延年矣。
《玉房秘诀》云∶若恶女之相，蓬头KT 面，槌项结喉，麦齿雄声，大口高鼻，目睛
混浊，口及颌有高毛似鬓发者，骨节高硕，黄发少肉，阴毛大而且强，人又多逆生，与之交
会，皆贼损人。
又云∶女子肌肤粗不御，身体 瘦不御，常从高就下不御，男声气高不御，股胫生毛不
御，嫉妒不御，阴冷不御，不快善不御，食过饱不御，年过四十不御，心腹不调不御，逆毛
不御，身体常冷不御，骨强坚不御，卷发结喉不御，腋偏臭不御，生淫水不御。
《大清经》云∶相女之法，当详察其阴及腋下毛，当合顺而濡泽，而反上逆，臂胫有毛，
粗不滑泽者，此皆伤男，虽一合而当百也。
又云∶女子阴男形，随月死生，阴雄之类，害男尤剧。赤发KT 面， 瘦痼病无气，
如此之人，无益于男也。
《玉房秘诀》记载：冲和子说：温婉善良、谨慎端庄，是女子美好的天性。如果能做到丰瘦适宜，高矮适中，不仅能让耳目愉悦，更有助于益寿延年。
又说：如果要与女子交合，必须选择年轻、尚未发育乳房、肌肉丰满、头发如丝、眼睛小而黑白分明的人。面部和身体湿润光滑、说话声音温和低沉的人，其四肢百骸的骨骼都应当隐没在肉中，肉多而骨头不明显的人，其阴部和腋下不应当有毛发，如果有毛发，应当细滑。
《大清经》记载：黄帝问：观察女子的方法是什么？素女回答：观察女子，天性温婉顺从，气息声音柔和，头发如丝且黑，肌肉柔弱骨骼纤细，身高不长不短，体型不大不小，阴道口希望较高，阴部无毛，精液充沛的人，年龄在二十五岁以上，三十岁以下，未曾生育过的人。交合之时，精液流动荡漾，身体动摇不定，无法自我控制，汗水四处流淌（“逋”通“布”或为版本异文），跟随对方的举止行动，男子即使不遵循特定的法度，得到这样的女子也不会造成损害。
又说：骨骼纤细肌肉柔弱，肉质柔润光泽，肤色清白薄嫩，指节细小隐没，耳朵眼睛鼻梁高挺洁白，身高不高不低，大腿丰满，阴道口希望高且紧密，体态饱满，上部无毛，身体滑腻如棉絮，阴部柔润（“淖”意为柔软滑润），如同膏脂，以此方式行房，整夜劳作也不疲倦，有利于丈夫，所生子女高贵显赫。
又说：凡是观察贵人尊贵女子的方法，想要得到皮肤滑润、骨骼柔弱、性情温和、头发润泽如漆、面目悦目美丽、阴部无毛、言语声音细小、阴道口向前的人，与她交合，整天劳作也不疲倦，务必寻求这样的女子，可以修养心性、延年益寿。
《玉房秘诀》记载：如果是厌恶的女相，头发蓬乱、面容粗糙，颈部僵硬喉结突出，牙齿像麦粒、声音雄浑，嘴巴大鼻子高，眼珠浑浊，口角和下颌有类似鬓角的长毛，骨节高耸硕大，发黄少肉，阴毛粗大而且强劲，体毛大多逆生，与她交合，都会损害人的健康。
又说：女子肌肤粗糙不可交合，身体消瘦不可交合，经常居高临下不可交合，男子声音气盛不可交合，大腿和小腿长毛不可交合，嫉妒心强不可交合，阴部寒冷不可交合，不快善（性格不好）不可交合，吃得太饱不可交合，年龄超过四十不可交合，心腹不调和不可交合，逆毛不可交合，身体常冷不可交合，骨骼强硬不可交合，卷发喉结突出不可交合，腋下有偏臭不可交合，分泌淫水不可交合。
《大清经》记载：观察女子的方法，应当详细检查她的阴部和腋下毛发，应当顺向且柔润光泽，如果反而向上逆生，手臂和小腿有毛，粗糙不滑润，这些都是伤害男子的，虽然一次交合相当于百次损害。
又说：女子具有男性特征，随月亮盈亏而死生，属于阴中之阳（雄性之类），对男子的危害尤为剧烈。红脸面庞、消瘦且有顽固疾病、没有元气，这样的人，对男子没有任何益处。
The *Yufang Mijue* (Secrets of the Jade Chamber) states: Chonghezi said, "Gentleness and kindness, prudence and caution, are the beautiful nature of women. If one can achieve a balance of plumpness and slenderness, and height and shortness that is appropriate, it not only pleases the eyes and mind but also significantly benefits longevity."
It further states: "When engaging in sexual intercourse with a woman, one must select a young woman who has not yet developed breasts, has abundant muscle, fine hair like silk, small eyes with distinct black and white pupils. Her face and body should be moist and smooth; her speech and voice should be harmonious and low. The bones of her four limbs and joints should be concealed within flesh, with more flesh and less prominent bone. There should be no hair on her genitals and underarms; if there is hair, it should be fine and smooth."
The *Daqing Jing* (Great Purity Classic) states: The Yellow Emperor asked, "What is the method for observing women?" Sunu replied, "To observe a woman: her nature should be gentle and compliant; her breath and voice soft; her hair silky and black; her muscles weak and bones slender; her height neither too long nor too short; her figure neither too large nor too small; her vaginal opening preferably high; no hair on her genitals; and she should have abundant seminal fluid. She should be between twenty-five and thirty years old, and have never given birth. During intercourse, her seminal fluid flows and ripples, her body trembles and cannot remain steady, sweat flows profusely ('bu' is a variant character or textual error), and she follows your movements. Even if the man does not follow specific techniques, obtaining such a woman will not cause harm."
It further states: "With fine bones and weak muscles, flesh that is soft and lustrous, clear and fair thin skin, fingers whose joints are fine and concealed, ears, eyes, and nose bridge high and bright white, height neither too short nor too tall, thick thighs, a vaginal opening that is high and tight, a full body, no hair above, a body slippery as cotton, and genitals soft and moist like grease, practicing this way allows for all-night activity without fatigue, benefiting the husband, and resulting in noble and wealthy offspring."
It further states: "Regarding the method for observing noble and respected women, one seeks those with smooth skin, weak bones, a harmonious temperament, hair lustrous as lacquer, pleasing and beautiful features, no hair on the genitals, fine and quiet speech, and a forward-facing vaginal opening. Intercourse with them causes no fatigue even after a whole day. One must strive to find such a woman, which can nourish the nature and extend life."
The *Yufang Mijue* states: "If encountering an undesirable female physiognomy: messy hair, rough face, stiff neck with a prominent Adam's apple, teeth resembling wheat grains, masculine voice, large mouth and high nose, turbid eyeballs, and long hair at the corners of the mouth and chin resembling sideburns; prominent and large bone joints, yellowish hair with little flesh, coarse and strong genital hair, and body hair growing in reverse directions; intercourse with such a person will all damage the human body."
It further states: "Women with coarse skin should not be engaged with; emaciated bodies should not be engaged with; those who habitually look down from a high position should not be engaged with; men with high-pitched voices and excessive qi should not be engaged with; those with hair on the thighs and calves should not be engaged with; jealous women should not be engaged with; women with cold genitals should not be engaged with; those who are not pleasant or kind should not be engaged with; those who are overly full after eating should not be engaged with; women over forty should not be engaged with; those with disharmonious heart and abdomen should not be engaged with; those with reverse-growing hair should not be engaged with; those with constantly cold bodies should not be engaged with; those with strong and hard bones should not be engaged with; those with curly hair and prominent Adam's apples should not be engaged with; those with axillary odor should not be engaged with; those producing excessive vaginal discharge should not be engaged with."
The *Daqing Jing* states: "The method for observing women requires detailed examination of the hair on the genitals and underarms. It should be downward-growing and soft/lustrous. If it grows upward in reverse, or if there is hair on the arms and calves, and the skin is coarse and not smooth, these all harm the male. Although only one union occurs, it is equivalent to a hundred instances of damage."
It further states: "Women with male characteristics, whose vitality fluctuates with the moon's phases, belong to the 'yin-male' category and cause particularly severe harm to men. Those with red faces, emaciation, chronic diseases, and lack of vital energy are of no benefit to men."