Looking at the evolution of "sexual affairs" in dynasties down the ages, a regular pattern emerges: the more prosperous and powerful a dynasty was, the less restrictions it placed on people in sexual matters; while the more weak and corrupt a dynasty was, the more tightly it controlled people's lives, and the more severe the constraints it placed on sex.
綜觀歷朝在「性事」方面的演變，有其不變的規律﹘ ﹘越是興盛強大的朝代，對人民性事的管束越是寬鬆；越是衰敗的朝代，對人民的控制越緊，性的禁錮也就越厲害。