Category:Sleeping adolescent boys

1. Babies (male) (birth – 24 months)

2. Boys (2–12 (puberty))

3. Adolescent boys (13–17 years)

4. Men (18+)

5. Young men (18-39 years)

6. Middle-aged men (40-59 years)

7. Old men (60+ years)

Definitions come from, but are slightly modified from, the Physical stages of human life as found at Wikipedia:Human development (biology).