sentence: Most boys go through puberty in their teens.
sentences_before: Young boys cannot ejaculate. A boy's first ejaculation usually happens about one year after he begins puberty, which is when his body starts changing into a man's body.
sentences_after: The first time a boy ejaculates usually happens when he is asleep. It happens without the boy's control, often when he is having a dream about sex. Scientists believe that wet dreams are the body's way of removing too much semen. When a boy begins masturbating, wet dreams usually stop happening.
concept_name: boy
headings: Ejaculation Men First ejaculation
categories: Female reproductive system Male reproductive system