The term man (irregular plural: men) is usually used for an adult, with the term boy being the usual term for a male child or adolescent (sometimes also applied to adult men).
However, the term is also used for a male human regardless of age, sometimes even extended to more primitive humanoids then the present species Homo sapiens sapiens, as in apeman.
Puberty
When a boy begins puberty, it is the confirmation that he will be transformed into a man. He will develop more muscle and body weight. He will get taller and broader. He will gain body hair i.e. hair will develop under his arms, around his face and sometimes on his chest. His genitals will grow and will be surrounded by pubic hair. Once a boy has completed puberty, he becomes a man and then has the organs to reproduce.
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