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避孕 |
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避孕方法:男性避孕方法
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陰莖退離
陰莖退離法在拉丁語中稱為性交中斷（coitus interruptus）（最好改用，性交驟然終止，coitus abruptus；中國大陸之前譯成“體外排精避孕法”——譯者注
）。意思很簡單，那就是當進行性交時，男方在射精前驟然把他的陰莖抽離陰道（這並不是性交中斷，而是終止性交）。這樣做的結果是，男方的精子不會射進女方的陰道並因此而避免受精。
雖然這在理論上看來令人信服，在實踐中卻並不總是靈驗。許多男子掌握不好陰莖抽離的時機。性交中總是擔驚受怕和需要控制性反應，這樣總是讓性伴雙方相當地緊張。在實際射精之前有一些精子游離出陰莖也是有可能的。甚至於已經射在陰道之外的精子只要與濕潤的體表接觸，也能夠自己遊進陰道內。鑒於此，陰莖退離並不是可靠的避孕方法。事實上，這種方法僅有的優點是勿需事前作出準備和隨時可用。可是，它的缺陷是如此之大，以至於大多數人會發現它只有在非同尋常的情形下才是合宜的，也就是只有當沒有其他方法可用時，才不得已而為之。 |
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Contraception
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Methods
of Contraception:Contraceptive
Methods for Men
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Withdrawal
The withdrawal method, also known by its Latin name coitus interruptus (better:
coitus abruptus), is probably the oldest method of contraception. It simply means that, when having intercourse, the man suddenly withdraws his penis from the woman's vagina just before he ejaculates (this does not interrupt the coitus, but actually ends it). As a result, his sperm is not deposited inside the woman's body and therefore cannot fertilize the egg.
While this sounds convincing in theory, it does not always work in practice. Many men have difficulty finding the right moment for withdrawal. The resulting worry and the need to control sexual reactions at all times can create considerable tension between sexual partners. It is also possible that some sperm is released from the penis well in advance of the actual ejaculation. Furthermore, even sperm cells that have been ejaculated outside the vagina can move inside by themselves as long as they are in contact with a moist surface. For these reasons,
withdrawal is not a reliable method of contraception. Its only advantage is the fact that it needs no preparation and can be used anytime. However, its disadvantages are so serious that most people will find it appropriate only in unusual circumstances, when no other methods are available. |
