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緒論 - 什麼是性行為? |
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性行為當前的含義 3:
生殖行為 |
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受精
為了達到有性生殖的目的，雌性動物和雄性動物必須實施特定的行為過程。在哺乳動物，這個過程可以導致雌雄性器官的交接，並由此才能導致雌性性細胞（卵子）由雄性性細胞（精子）授精。可是，單有受精尚不足夠，因為必須隨後要有成功的懷孕和分娩。
Fertilization
For the purpose of sexual reproduction, a certain sequence of actions has to be performed by females and males. In mammals, this sequence may lead to a joining of their sex organs and this, in turn, can result on the fertilization of a female sex cell (egg) by a male sex cell (sperm). However, fertilization alone is never enough, because it has to be followed by a successful pregnancy and birth.
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術語“性行為（sexual
behavior）”可以是指必需受精的所有舉動和反應。
這是最狹義的定義。該定義表明每一個高等哺乳動物物種被分成兩個性別群體，即雄性與雌性，它還表明它們行有性生殖。更確切地說，雄性與雌性動物產生不同而相互彌補的性細胞（配子）。當一個雄性性細胞（精子）與一個雌性性細胞（卵子）相遇並因而受精的時候，新生命便開始發育。為了達到受精的效應，雄性和雌性個體必須經歷一些特有而非常精確和特殊的身體運動及其反應過程。這個過程（或這個過程的任何一部分）才被人適當地稱作性行為（sexual
behavior）。
Introduction - What is sexual behavior?
Current Meanings of the Term 3: Reproductive Behavior
The term "sexual behavior" can refer to all actions and responses necessary for fertilization.
This is the narrowest definition. It reflects the observation that each species of the higher animals is divided into two groups or sexes, male and female, and that they reproduce sexually. That is to say, males and females produce different but complementary sex cells (gametes). New life may begin to develop when a male sex cell (spermatozoon) unites with and thus fertilizes a female sex cell (ovum). In order to effect this fertilization, a male and a female individual have to go through a certain characteristic and very specific sequence of physical motions and responses. This sequence (or any part of it) is properly called sexual behavior.
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