性行为的基本类型

当仍在婴儿期，男女都可能自己学会自娱。当他们玩弄自己的性器官的时候，可能会发现令人愉悦的某种感觉，而且从那以后会设法重复这种体验。不过，大多数情况下，直到青春期时才开始有有意识和有规律的自娱。男孩常常被其他男孩教会自娱，或者他们在交谈中听到有关自娱的事情。既然男孩似乎比女孩讨论自娱公开得多，那么，他们通常在较早的年龄就会获得更多的性知识。反过来，女孩大约都是独自或偶然发现自娱的乐趣。某些女孩是通过与男孩“爱抚”被男孩子所引见的，而其他女孩在书籍或杂志里阅读而知。甚至有的女孩自娱了许多年之后才认识到自己正在做什么。

1. Sexual Self-stimulation: Masturbation

Early Experiences

Both females and males may learn to masturbate all by themselves while still in their infancy. As they play with their sex organs, they may discover some pleasurable feeling and then simply try to repeat the experience. However, in most cases, conscious and regular masturbation does not begin until adolescence. Boys are often taught how to masturbate by other boys, or they hear about it in their conversations. Since boys seem to discuss sexual matters much more openly than girls, they usually obtain more sex information at an earlier age. In contrast, girls are more likely to discover masturbation alone and by accident. Some of them are introduced to it through "petting" with a boy, and others read about it in books or magazines. There are even cases of girls who masturbate for years before they realize what they are doing.