They are no longer children, yet they are not yet adults. Their bodies and their needs are changing. Many teens fantasize, or daydream about relationships and sex. It is normal to think about sexuality even if a teen is not having sex. Some look at erotic pictures and many masturbate.
Masturbation is a normal and safe way to release sexual feelings.
It is also a safe way to learn about what gives your body pleasure. Unless masturbation gets in the way of going to school or one's social life, it is considered normal. Young adults often talk a lot about sex. Many teens talk about sex even though they have not had sex. Sometimes people lie and say they have had sex to seem cool or grown up.