性行為的基本類型

性交合的技巧 2

性經驗有限的男性也許認為一成不變的、深深的和快速的抽插最為有效，但是，事實上這是罕見的情形。至少在性交合的開頭，通過淺而緩的抽插，他能夠給予和得到更多的愉悅。甚至，他通過讓女性先掌握主動就能夠學到許多經驗。在大多數情形下，女方會更喜歡不慌不忙的長時間抽插，其間，陰莖頭在每一次重新深深插入陰道之前，來回進出陰道口。這樣做的理由其實很簡單：隨著不斷提升的性興奮，因為陰道逐漸充盈著血液，當它的下部1/3縮窄時，上部2/3擴張。換一句話說，恰恰是陰道的下1/3（所謂的高潮平臺）給予了陰莖最大的刺激（見“女性性反應”。）

同樣應該提到是，許多女性要學會控制環繞陰道入口深層肌肉的技巧。如此一來，這些肌肉會對陰莖產生持續緊握的作用，並進而增加相互的刺激。有寬大和鬆弛陰道口的女性，那些未曾意識到陰道肌肉存在的女性，或者感到陰道肌肉不發達的女性，都可以通過適當的鍛煉來改善她們的症狀（參見“ 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 In most cases, she will prefer long and deliberate movements in which the tip of the penis is withdrawn toward the vaginal opening before each new deep penetration.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”).