性行为的基本类型

性交合的技巧 2

性经验有限的男性也许认为一成不变的、深深的和快速的抽插最为有效，但是，事实上这是罕见的情形。至少在性交合的开头，通过浅而缓的抽插，他能够给予和得到更多的愉悦。甚至，他通过让女性先掌握主动就能够学到许多经验。在大多数情形下，女方会更喜欢不慌不忙的长时间抽插，其间，阴茎头在每一次重新深深插入阴道之前，来回进出阴道口。这样做的理由其实很简单：随着不断提升的性兴奋，因为阴道逐渐充盈着血液，当它的下部1/3缩窄时，上部2/3扩张。换一句话说，恰恰是阴道的下1/3（所谓的高潮平台）给予了阴茎最大的刺激（见“女性性反应”。）

同样应该提到是，许多女性要学会控制环绕阴道入口深层肌肉的技巧。如此一来，这些肌肉会对阴茎产生持续紧握的作用，并进而增加相互的刺激。有宽大和松弛阴道口的女性，那些未曾意识到阴道肌肉存在的女性，或者感到阴道肌肉不发达的女性，都可以通过适当的锻炼来改善她们的症状（参见“ PC肌”）。

2. Heterosexual Intercourse: Genital Intercourse

Coitus

Techniques of Coitus 2
Men with limited sexual experience may 性交合 that unvaried, deep, and quick thrusts are the most effective, but in actual fact this is rarely the case. At least at the beginning of coitus, a man can give and receive much more pleasure by moving slowly and keeping the penetration shallow. Indeed, he may learn a great deal by first leaving the initiative to the woman. In most cases, she will prefer long and deliberate movements in which the tip of the penis is withdrawn toward the vaginal opening before each new deep penetration. The reason for this is simple: With mounting sexual excitement, the inner portion of the vagina widens while the outer third narrows as it becomes congested with blood. In other words, it is the outer third of the vagina (the so-called orgasmic platform) which provides the greatest stimulation for the penis (see "The Female Sexual Response.")
It should also be mentioned that many women learn to control the interior muscles surrounding the vaginal entrance. Thus, they keep a firm grip on the penis and increase the mutual stimulation even further. (Women who have a wide and slack vaginal entrance, who are unaware of their vaginal muscles, or who find them underdeveloped, can improve their condition by appropriate exercises (see "The PC Muscle”).