性,是生物的本能之一,能够同它“竞争”的只有饥和渴。性,既是生物生理的需要,也是繁衍后代,保存本类的需要。许多心理学及医学教科书中都描述过人类性反应的模式,即序曲,爱抚活动,性的结合及尾声。医学上通常把性的结合分为兴奋期、平台期、高潮期 Sexuality is one of the creatures’ instincts that only hunger and thirst can compete with it. Sex, both the need of biological physiology, but also multiply offspring, the need to save this category. Many psychology and medical textbooks describe patterns of human sexual response, ie, overtures, caressing activities, sexual associations, and ending. Usually the combination of sex medicine is divided into excitement, platform, climax