Growing up - boys' puberty This lesson follows on from our girls' growing up lesson which can be found here. In this lesson, the students will be introduced to the changes that boys commonly experience during puberty, and how a boy's body changes as he grows older. This lesson serves as an introduction to changes that boys commonly experience including subjects such as body odour, facial and pubic hair, growth spurts, increased muscles mass, changes to the male gentitals, erections and wet drea