sentence: Scientists believe that wet dreams are the body's way of removing too much semen.
sentences_before: Young boys cannot ejaculate. A boy's first ejaculation usually happens about one year after he begins puberty. For some boys, the first ejaculation takes place when they are sleeping. This is called a nocturnal emission or a wet dream. It happens without the boy's control, often when he is having a dream about sex.
sentences_after: A male masturbates when he rubs his penis to make himself feel good sexually. The study also found that most boys who have their first ejaculation by masturbating do this a year or more earlier than boys who have their first ejaculation through a wet dream. Kinsey, 'Sexual Behavior in the Human Male', p. 299. When a boy begins masturbating, wet dreams often stop happening because semen is taken out from his body regularly.
concept_name: scientist
headings: Puberty Body changes in males Sex organs grow bigger
categories: Physiology Human sexuality