- Ask Andy
ANDY'S ANSWER: Puberty is a relatively long process from start to finish, and most people don't notice the early signs. It normally begins for boys somewhere between the ages of 9 and 15. The first indication that a boy has begun puberty is that his testes will start to enlarge and public hair will begin to develop. Other signs are increased body and facial hair along with body odor and acne. Every boy develops at his body's own rate, and someone who starts puberty earlier or later than someone else of the same age is still quite normal.