However, it can begin anywhere between 9 and 15 years. Near the beginning of puberty hair grows in the armpits, and you start to have body odor. Testosterone causes the voice box to enlarge, and your voice starts to sound deeper.The physical changes usually take 3 to 4 years to be completed. Since it takes awhile, your voice may go through a squeaky period.You need to think about the physical and emotional risks you will be taking.
Puberty is the time when a boy's body becomes a man's body.
It is a time of much physical and emotional growth.
As your body is developing, your reproductive system is changing. They can happen a few times a week, a few times a month, or maybe not at all. Your parents know that it happens, so you do not need to be embarrassed by it.
Hormones from the brain tell the testicles to produce sperm. Semen can be stored for awhile, but eventually it needs to be released. Masturbating is touching, rubbing or stroking the penis for sexual pleasure.
You become more independent and start doing things without your parents.