Child begins to separate from parents. Child begins to experience body changes during puberty. Some girls begin to menstruate. Child may feel modest. Child may masturbate, sometimes to orgasm.
Child hides sex play from parents.
E. 13 Years of Age and On 1. On the average, boys develop about 2 years later than girls. Most girls menstruate by age 16. Most boys are capable of an ejaculation by 15. 4. Child seeks greater independence, often rebelling against parents.