On the way to becoming a man, a boy's body will go through a lot of changes, including But keep in mind that puberty starts when a boy's body is ready, and . An erection is what happens when your penis fills up with blood and hardens.
As a boy grows up his penis will grow in seize. But growth is the most noticeable during the teen years. 2. During the teen years a boy will ejaculate (come) when .
Find out when puberty begins, the signs of puberty in boys and girls, and how long But it's different for everyone, so don't worry if your child reaches puberty before to thin and redden; pubic hair also starts to appear at the base of the penis.