中学生正处在身体生长发育的“第二个高峰期”(从十一二岁到十七八岁),少男少女的身体发生了巨大的变化,开始显现出各自鲜明的性别特征。在这一时期,人的性器官明显发育并出现第二性征,性意识迅猛觉醒,从而进入性的活跃期。 Middle school students are in the “second peak period” (from 11 to 18 years old) of physical growth and development. The bodies of boys and girls have undergone tremendous changes and they have begun to show their distinctive gender characteristics. During this period, the human sexual organs were clearly developed and secondary sexual characteristics emerged. Sex consciousness quickly awakened and entered the active period.